Opinion for the Court filed by Circuit Judge HARRY T. EDWARDS.
This case initially arose as a result of an unfair labor practice charge filed by John H. Fournelle, an employee at Bethlehem Steel Corporation, on August 4, 1978. A Complaint was issued on September 28, 1978, and amended on March 9, 1979, alleging that Bethlehem violated sections 8(a)(3) and (1) of the National Labor Relations Act (“NLRA” or “Act”), 29 U.S.C. §§ 158(a)(3) and (1), by suspending Fournelle for ten days “because of his position as welding department committeeman in the Union.” Joint Appendix (“J.A.”) at 3.
On September 14, 1979, the Administrative Law Judge (AU) issued a decision finding that Fournelle had in fact participated in and supported an unauthorized strike. However, the ALJ also found that Bethlehem had discriminated against Four-nelle on the basis of his union position by suspending him for ten days as compared with the five-day suspensions issued to other strikers. ALJ at 983-87. 1 On September 30, 1980, although sharply divided, see *333 note 6 infra, a three-member panel of the National Labor Relations Board (“NLRB” or “Board”), with one member dissenting, affirmed the rulings, findings and conclusions of the ALJ and adopted the ALJ’s Recommended Order. ALJ at 982-83. Fournelle and Bethlehem have petitioned for review of the order of the Board, and the NLRB has cross-petitioned for enforcement of that order. 2
Two issues are presented on this appeal. First, we must decide whether Fournelle was lawfully subject to any discipline. Fournelle does not dispute the finding of the Board that he traveled to and participated in a strike meeting after he left work, at which meeting he voted and made statements supporting the strikers’ cause. Nor does he deny that the other employees engaged in an unprotected strike. Instead he argues that, because he had left work on the day in question, for reasons unconnected with the strike, and because a company work rule prevented his return to work on the day of the strike, he was not properly subject to discipline under a contractual term that forbade employees to encourage, sanction, or take part in strikes. We reject Fournelle’s arguments, concluding that the cited collective bargaining agreement effectively waived any rights that Fournelle might otherwise have had to escape discipline for his actions at the union hall.
Second, we must decide whether to enforce the decision of the Board that Bethlehem violated sections 8(a)(1) and (3) 3 of the NLRA by punishing Fournelle, a union official, more harshly than other strike participants. We deny enforcement of the Board’s order and hold that the Board should have given effect to á clear arbitral decision that interpreted the contract as allowing the selectively greater punishment of union officials who engage in unauthorized strikes.
I. BACKGROUND
A. The Strike and its Aftermath
Although the parties disagree about the legal significance of the underlying facts, the facts themselves are not disputed. The findings of the ALJ, affirmed by the Board, may be briefly summarized. 4
On the morning of July 28, 1978, approximately 162 employees in the welding department at the shipyard of Bethlehem at Sparrows Point, Maryland, walked off the job and assembled at the union hall. ALJ at 983. The walkout was a protest against the suspension by Bethlehem of Jim Childs, a union steward. Id. This concerted work stoppage, all parties agree, was a “wildcat” strike in violation of the collective bargaining agreement then in effect between Bethlehem and the Industrial Union of Marine and Shipbuilding Workers, AFL-CIO, and its affiliated Local 33 (“IUMSW”). Four-nelle Br. at 4 & n.4; Bd. Br. at 11; Bethlehem Br. at 6. Article XVIII of the Bethlehem-IUMSW agreement provided:
During the term of this Agreement neither the Union nor any Employee shall instigate, encourage, sanction, or take part in any strike, sit-down, slowdown or other stoppage, limitation or curtailment of work or production, or take part in any picketing, boycotting or other interference with or demonstration against any Yard or its business or operations, either in such Yard or elsewhere .... The Company may terminate the employment of or otherwise discipline any Employee who willfully violates any of the provi *334 sions of this Agreement in any material respect.
J.A. at 26-27.
Petitioner Fournelle, an elected union committeeman, left work at about the same time that the other employees left, but, as the ALJ found, Fournelle did not leave for reasons connected with the wildcat strike. Instead, he left because his clothes had become wet in a rainstorm, which made it potentially dangerous to perform his work as an arc welder, and “because he had determined to take the day off in any event to see his dentist to have a broken tooth repaired before the weekend.” ALJ at 986. After he left work, Fournelle went home and changed his wet clothes. He then went to a local bar, cashed his paycheck, had a few drinks, and decided to go to the meeting of the wildcat strikers at the union hall. Id. at 985.
When Fournelle joined the strikers at the union hall, he found the place “dark and in some confusion.” Id. A television news crew arrived at the hall, and sought permission to film the meeting and interview some of the strikers. Some union officers initially refused to allow the television crew to enter, but upon a motion by Fournelle the workers voted to allow the crew to remain and conduct interviews. Id. One of the workers interviewed was Fournelle, and he expressed his opinion that Bethlehem’s discipline of steward Childs was unjustified; he further complained about working conditions at Bethlehem: “They are increasing the amount of work we have to put out. We’ve been called to the office for low production. They want us to be their slaves, and they’re offering us no other choice but to stand up for ourselves.” Id. After the meeting at the union hall concluded, Fournelle went to another bar and made an appointment with his dentist. The dentist repaired Fournelle’s damaged tooth later that afternoon. Id. at 986.
The next workday, July 31, Fournelle reported for work with a note from his dentist certifying that he had been in the dentist’s office for treatment. Management officials attempted to interview Fournelle about his conduct at the union hall, but Fournelle was uncooperative. Three days later, Bethlehem notified Fournelle that he was to be suspended for ten days; the disciplinary report stated that Fournelle was being punished for “participating as an elected union official in a work stoppage on July 28, 1978 in violation of Article XVIII of the Agreement.” Id. Bethlehem subsequently disciplined the rank-and-file participants in the work stoppage less severely: they were given five-day suspensions. Id. at 983.
B. The Proceedings Below
On August .4, 1978, Fournelle filed an unfair labor practice charge against Bethlehem. J.A. at 1. The General Counsel of the NLRB issued a complaint on September 28, 1978, and amended it on March 9, 1979, alleging that Bethlehem had violated sections 8(a)(1) and (3) of the NLRA, 29 U.S.C. §§ 158(a)(1) and (3), 5 by suspending Four-nelle because of his position as a union committeeman. J.A. at 2-5.
After a hearing, the Administrative Law Judge concluded that Fournelle, by his actions at the union hall, had violated the term of the collective bargaining agreement that expressly forbade employees to “instigate, encourage, sanction, or take part in any strike, sit-down, slowdown or other stoppage ... of work.” J.A. at 26. The ALJ stated that Fournelle
by his conduct at the union hall in supporting the unprotected strike became a participant therein in violation of the *335 contractual no-strike provision, and was subject to discipline on the same basis as any of the other employees who participated in the illegal walkout.
ALJ at 986.
The ALJ further found that Bethlehem had violated sections 8(a)(1) and (3) of the Act by punishing Fournelle more harshly than other employees “solely because he was an elected union official.” Id. at 987. The ALJ accordingly ordered Bethlehem to pay Fournelle back pay for five days, to expunge Fournelle’s disciplinary records, to post a notice, and to cease and desist from similar practices in the future. Id. A divided panel of the NLRB affirmed the ALJ’s findings and conclusions and adopted his recommended Order. 6
II. FOURNELLE’S PARTICIPATION IN UNPROTECTED ACTIVITY
The first question presented is whether Fournelle was properly subject to any discipline for his actions at the union hall. Fournelle contends that he was immune to discipline because his actions were protected by section 7 of the NLRA; 7 Bethlehem and the NLRB respond that the collective bargaining agreement effectively waived any section 7 rights that Fournelle might otherwise have had.
Section 7 of the Act grants to employees “the right to self-organization, to form, join, or assist labor organizations, to bargain collectively through representatives of their own choosing, and to engage in other concerted activities for the purpose of collective bargaining or other mutual aid or protection.” 8 An employee’s section 7 rights to engage in concerted activities, however, are neither unqualified nor absolute. 9 Additionally, and more important for present purposes, certain rights granted by section 7 may be waived pursuant to collective bargaining.
In the United States, it is commonplace for unions and employers to enter collective bargaining agreements that waive the rights of employees to engage in strikes during the contract term.
See NLRB v. Allis-Chalmers Mfg. Co.,
The policies compelling the Board and courts to honor such contractual waivers are fundamental ones under the NLRA. As the Supreme Court stated in
Mastro Plastics Corp. v. NLRB, supra,
such waivers enable the parties to substitute peaceful means of dispute resolution — grievance procedures and arbitration — in place of economic warfare. “Provided the selection of the bargaining representative remains free, such waivers contribute to the normal flow of commerce and to the maintenance of regular production schedules.”
Fournelle does not dispute that the collective bargaining agreement between his union and Bethlehem effectively waived the rights of the other employees to engage in the July 28 strike. Fournelle Br. at 4 & n.4. Rather, he argues that, because he had left work on July 28 for reasons unconnected with the strike, and because he was forbidden by a company work rule from returning to work once he had left for the day, 12 he cannot be found to have participated in the strike.
Although novel, Fournelle’s argument has little merit. It is clear that the agreement in this case sought to forbid explicitly a wide range of employees’ strike-related activity, i.e., other than the simple withholding of labor. Article XVIII of the agreement explicitly states that during the term of the agreement “neither the Union nor any Employee shall instigate, encourage, sanction, or take part in any strike, sit-down, slowdown or other stoppage, limitation or curtailment of work or production, or take part in any picketing, boycotting or other interference with or demonstration against any Yard or its business or operations, either in such Yard or elsewhere. . . . The Company may terminate the employment of or otherwise discipline any Employee who willfully violates any of the provisions of this Agreement in any material respect.” J.A. at 26-27 (emphasis added). It is thus plain that Fournelle’s conduct on July 28 was prohibited by the contract. He voluntarily traveled to join the strikers at the union hall. ALJ at 985. When he arrived there, he made a motion and then voted to allow the television crew to remain in the hall, presumably so as to publicize the strikers’ grievances. Id. His statements in the television interview indicated his strong support of the strikers’ goals. In other words, he encouraged and sanctioned the *337 strike, as specifically forbidden by the contract. 13
As an alternative position, Fournelle argues that the Board and the ALJ did not specifically “rely on” the language of the contract precluding employees from “sanctioning” or “encouraging” a strike and, therefore, this court cannot sustain the Board’s decision “on that basis.” Fournelle Rep. Br. at 3 n.3. This argument fails in its initial premise: the ALJ’s decision, affirmed by the Board, stated that Fournelle “by his conduct at the Union hall in supporting the unprotected strike became a participant therein in violation of the contractual no-strike provision.” ALJ at 986. The ALJ clearly had in mind the contractual language at issue, although he buttressed his conclusion with other, arguably inappo-site, authority.
14
To require a greater clarity in the ALJ’s reasoning would be a meaningless formalism: as the Supreme Court said in another context, “[s]ubstantive rights and duties in the field of labor-management do not depend on verbal ritual reminiscent of medieval real property law.”
NLRB
v.
Rockaway News Supply Co.,
Even though the contract explicitly forbade Fournelle’s conduct, we must consider one further argument. Fournelle argues that the contractual provision prohibiting employees from sanctioning or encouraging strikes, if applied to justify his suspension, would constitute an impermissible waiver of his section 7 right to comment freely about the strike and the grievances underlying it. This right to comment, Fournelle contends, cannot be waived in collective bargaining.
It is true that the Supreme Court has held that some of the rights guaranteed by section 7 of the Act cannot be waived by collective bargaining. In
NLRB v. Magna-vox Co.,
Because the Board properly found that Fournelle did more than just “comment” on the strike, and because the strike waiver as applied here clearly does not pertain to activity of the sort found to be
*338
protected in
Magnavox,
we can find no merit in this last argument raised by Four-nelle. The same policies that support a simple waiver of the right to engage in economic strikes likewise support a waiver of the right to sanction and encourage contractually forbidden strikes. A strike is more than the mere withholding of labor. It may gain impetus, direction and duration as a result of the conduct of employees who, though not contractually obligated to be at work during the strike, nonetheless lend their voices and their presence to strike activity. A contract provision that permits discipline of employees who sanction and encourage strikes, as well as of those who withhold their labor, may thus significantly reduce the frequency and duration of disruptive strikes. Simple waivers of the right to strike are favored because they enable the parties to substitute peaceful conciliation for economic warfare, and thus “contribute to the normal flow of commerce and to the maintenance of regular production schedules.”
Mastro Plastics,
III. THE LEGALITY OF SELECTIVE DISCIPLINE FOR UNION OFFICIALS
As noted above, the collective bargaining agreement effectively waived Fournelle’s rights to escape any discipline for his actions at the union hall. Thus, we uphold the conclusion of the Board that Bethlehem acted permissibly in suspending Fournelle for five days, the same punishment imposed on the other strikers. We turn now to a consideration of the Board’s ruling that Bethlehem violated the NLRA by suspending Fournelle for an additional five days. Our analysis of this second issue proceeds in two stages. First, we consider whether the parties to a collective bargaining agreement may legitimately agree that union officials may be more severely punished than other employees for violation of a contractual no-strike clause; on this point, we conclude that the parties may reach such an agreement. Second, in section IV, we consider whether a clear arbitration ruling by the parties’ own permanent umpire, holding that selective discipline is permissible under the parties’ collective agreement, should be given the same effect as clear contractual language permitting disparate discipline; on this second issue, we conclude that in this case the arbitrator’s ruling should be considered authoritative.
We are not called upon in this case to decide whether an employer may selectively discipline a union official in a situation where the collective bargaining agreement is neutral on the question (i.e., the contract contains only a general no-strike clause) and there is no clear arbitration decision construing the contract to allow for selective discipline. In such a situation, if the union official is not otherwise a leader of the unprotected strike, selective discipline may run afoul of sections 8(a)(1) and (3) of the NLRA. 15 However, we need not decide this question. In the present case we need only inquire whether the parties may, through the collective bargaining process, create higher duties for union officials during strikes and whether the parties may thus waive the rights of union officials to escape selectively greater discipline for their violation of those higher duties.
*339
The Board has been notably inconsistent in answering this question. In
Super Valu Xenia,
Until recently, therefore, the Board appeared to have adopted a
per se
rule forbidding the selective discipline of union officials, regardless of whether the parties had collectively bargained for a different result. This per
se
rule, however, as we discuss below, has been unanimously rejected by the courts of appeals that have considered it. In light of this rejection, the Board appears to have retreated from the extreme position taken in the
Precision Castings
and
Gould
cases. In
Armour-Dial, Inc.,
Although the Board has vacillated in its adherence to the
per se
rule, the courts of appeals considering the rule have firmly rejected it. The Third Circuit, on petition for review of the Board’s decision in
Gould, Gould, Inc. v. NLRB,
The Seventh Circuit has reached the same conclusion. That court, in
Indiana & Michigan Electric Co.
v.
NLRB,
This unanimous rejection of the Board’s
per se
rule is also supported by the general principles of waiver that we have examined above. If union officials have a right, in the absence of a contract term to the contrary, to escape harsher punishment for their participation in unauthorized strikes, this is a right “in the economic area,” subject to contractual waiver under
Mastro Plastics, supra,
and not a right pertaining to the choice of the bargaining representative protected from waiver by
Magnavox, supra.
The parties to a collective bargaining agreement may seek to increase the effectiveness of a no-strike clause by providing for heightened efforts on the part of union officials to avoid or reduce the disruptive effects of strikes during the contract term. Provision of harsher penalties for union officials who disobey these duties may spur union officials to honor those duties. Allowing the parties to give effect to such contractual terms furthers the strong national labor policy of substituting peaceful dispute resolution for industrial strife, and the equally strong policy of free
*341
dom of contract.
See H. K. Porter Co.
v.
NLRB,
That one group of employees is treated differently from another group under such a contract term is not in itself objectionable. As the Supreme Court said in
Ford Motor Co. v. Huffman,
Inevitably differences arise in the manner and degree to which the terms of any negotiated agreement affect individual employees and classes of employees. The mere existence of such differences does not make them invalid. The complete satisfaction of all who are represented is hardly to be expected. A wide range of reasonableness must be allowed a statutory bargaining representative in serving the unit it represents, subject always to complete good faith and honesty of purpose in the exercise of its discretion.
The contract’s specific limitation on the exercise of section 7 rights by union officials is likewise not objectionable. The First Circuit, in
NLRB v. Wilson Freight Co.,
Similarly, the Board and courts have upheld contract terms that provide limited superseniority for union officials when such superseniority furthers “the effective administration of bargaining agreements on the plant level by keeping the steward on the job.”
Teamsters Local 20 v. NLRB,
For the reasons indicated, we hold that where the collective bargaining process has imposed higher duties upon union officials than the rank and file, the officials may be more harshly punished than the rank and file for their conduct in violation of the no-strike clause and an employer’s selective discipline of the offending union official will not constitute an unfair labor practice.
IV. GIVING EFFECT TO AN ARBITRATOR’S DECISION AS THE AUTHORITATIVE INTERPRETATION OF THE NO-STRIKE CLAUSE
We need not engage in an unaided examination of the contract to determine whether *342 Bethlehem and the IUMSW agreed that union officials could be more harshly punished. All we need decide is whether to give effect to an arbitration decision, construing the same no-strike clause at issue here but involving a different grievance claim. This arbitration decision explicitly held that union officials working under the Bethlehem-IUMSW agreement have higher duties during strikes than rank-and-file employees, and that breach of those duties may subject union officials to more severe discipline.
On June 5, 1978, Impartial Umpire Laurence E. Seibel rendered a binding arbitration decision based on facts virtually indistinguishable from those in the present ease. 19 On July 7, 1977, seventeen employees in the Optical Detail Department at Bethlehem’s Sparrows Point shipyard walked off the job. J.A. at 37-88. The rank-and-file employees who participated in the walkout were suspended for five days; the one union official who participated in the walkout, Shop Steward Gunkel, was suspended for ten days. Id. at 38. The disciplinary notice given to Gunkel stated that he was to be suspended for “participating as Shop Steward in a work stoppage ... in violation of Article XXVIII [sic] of the Agreement.” Id. The grievance submitted to arbitration, as umpire Seibel recognized, involved the questions (1) whether the walkout was in violation of the no-strike clause, (2) whether Steward Gunkel participated in the walkout and (3) whether the disparate penalty imposed on him was appropriate. Id. at 42.
Umpire Seibel found that the walkout was a concerted action by the employees in protest of Bethlehem’s temporary assignment of a non-bargaining-unit employee to work in the Optical Detail Department. Id. at 49. Accordingly, he found that the walkout was a violation of the no-strike clause. Id. at 49-50. Seibel further found that Steward Gunkel did in fact participate in the walkout. Id. Next Seibel turned to the issue of Gunkel’s disparate punishment. His discussion of this point merits quotation at length:
[T]here is no evidence that Gunkel, as a Shop Steward, took any action whatsoever to discourage the men from leaving and while he may well have not been the instigator nevertheless his inactivity could well be viewed as an encouragement or at least as representing tacit approval of what was happening. As Shop Steward he was under an obligation to seek to dissuade the employees in the shop under his jurisdiction from taking any illegal work stoppage action and evidence in this regard that he did so is completely lacking. In my opinion, Gricvant Gunkel’s action or lack of actions cannot lie regarded in the same vein as that of other employees. He had a greater obligation than they to make an effort to preclude violation of the Agreement and in this respect he failed to meet such obligation. Accordingly, the imposition of an additional five day suspension does not appear to me to be unwarranted.
Id. at 50 (emphasis added).
Despite the contentions of the Board and Fournelle to the contrary, the decision interpreted the agreement 20 to allow Bethle *343 hem to selectively discipline union officials who disobey the no-strike clause. The decision did more than determine the fairness of a single act of discipline meted out to a single employee: it clearly rested on the premise that union officials have a “greater obligation ... to make an effort to preclude violation” of the contractual no-strike provision. Breach of this obligation, Seibel concluded, merited selective discipline of the offending union official.
The meaning of the arbitrator’s award is clear. 21 The remaining question is whether the award should have been accorded prece-dential effect by the Board. If the award should be given precedential effect, our inquiry need go no further: if the collective bargaining agreement authorized Bethlehem’s selective discipline of Fournelle, then, for the reasons given in the preceding section, the Board erred in finding that discipline to constitute an unfair labor practice. But the Board and Fournelle argue that, because the contract does not explicitly provide that the arbitrator’s decisions will be precedentially binding in later arbitrations, this court should ignore Umpire Seibel’s decision.
This argument finds some support in the recent decision of the Third Circuit in
Metropolitan Edison Co. v. NLRB,
The Supreme Court recognized in the
Steelworkers Trilogy
that arbitration is an essential part of the collective bargaining process. The Court explained in
Steelworkers v. Warrior & Gulf Navigation Co.,
Thus, it is simply inconsistent with the realities of labor arbitration to maintain that, without an express contractual term giving the results of past arbitrations precedential effect, the arbitrator’s rulings are isolated utterances without a general application to the ongoing collective bargaining relationship. This is especially true, as in the present case, of arbitration awards rendered by permanent umpires. As recognized by a respected authority on the arbitral process, “[t]he most pronounced situation in which prior arbitration awards have ‘authoritative’ type force is that of arbitra *345 tion by permanent umpires or chairmen.” F. Elkouri & E. Elkouri, supra, at 374. Indeed, in the decisions of the umpires selected to decide grievances at Bethlehem’s Sparrows Point shipyard, we find an adherence to arbitral precedent that is as scrupulous as a court’s application of the doctrine of stare decisis. E.g., Bethlehem Steel Co., Shipbuilding Division, Sparrows Point Yard v. Industrial Union of Marine & Shipbuilding Workers Local 38, 43 Lab.Arb. (BNA) 228, 230 (1964) (Crawford, Arb.) (precedent regarding consequences of erroneous seniority lists); Bethlehem Steel Co., Shipbuilding Division, Sparrows Point Yard v. Industrial Union of Marine & Shipbuilding Workers Local 85, 41 Lab.Arb. (BNA) 587, 589-90 (1963) (Crawford, Arb.) (precedent regarding meaning of contract term allowing extra compensation for unusually dirty work).
The parties to the collective bargaining agreement in the present case would no doubt be highly displeased if arbitral stare decisis were as inconstant a doctrine as Fournelle and the Board would have us believe. The whole function of arbitration as a “vehicle by which meaning and content are given to the collective bargaining agreement” would be impaired if the parties could not rely on a settled construction of their agreement. It is instructive to note that neither of the parties to this agreement — Bethlehem and the IUMSW — has challenged Umpire Seibel’s construction of the no-strike clause. Bethlehem, as is hardly surprising, has maintained throughout that the agreement means what the umpire said; it is perhaps more significant that the IUMSW has not attempted to challenge the validity of Fournelle’s suspension.
Therefore, we hold that the Board was not free either to ignore the meaning of the contract or to substitute its own interpretation of the contract for the interpretation of the arbitrator.
23
As the Supreme Court stated in
NLRB v. C & C Plywood Corp.,
To have conferred upon the National Labor Relations Board generalized power to determine the rights of parties under all collective agreements would have been a step toward governmental regulation of the terms of those agreements. We view Congress’ decision not to give the Board that broad power as a refusal to take this step.
Id.
at 427-28,
V. CONCLUSION
For the reasons set out above, we affirm the Board’s order insofar as it concluded that Fournelle was properly subject to disci *346 pline for his conduct at the union hall in violation of the no-strike clause of the collective bargaining agreement. We deny enforcement of the portion of the Board’s order directing Bethlehem to remedy unfair labor practices.
So ordered.
Notes
. “ALJ” refers to the decision of the ALJ. . See note 4 infra.
. This court has jurisdiction under 29 U.S.C. §§ 160(e) & (f). For the published report of the decision of the NLRB and that of the Administrative Law Judge, see
Bethlehem Steel Corp.,
. These statutory provisions are quoted at note 5 infra.
. The decision of the ALJ, appended to the Decision and Order of the Board, is reported at
. Sections 8(a)(1) and (3), 29 U.S.C. §§ 158(a)(1), (3), provide, in pertinent part:
(a) Unfair labor practices by employer
It shall be an unfair labor practice for an employer—
(1) to interfere with, restrain, or coerce employees in the exercise of the rights guaranteed in section 157 of this title;
(3) by discrimination in regard to hire or tenure of employment or any term or condition of employment to encourage or discourage membership in any labor organization
. Board Member Penello agreed with the conclusion that Fournelle participated in an unprotected strike, but expressed the opinion that an employer may “discipline a union official more harshly than other employees for participating in an unprotected strike, because the official has thereby failed to fulfill his contractual responsibility to take affirmative action to bring such a strike to an end.”
Chairman Fanning agreed with the conclusion that Fournelle participated in the strike, but disclaimed any reliance on
Bechtel Corp.,
Member Jenkins approved the ALJ’s remedy but stated that he would have further required Bethlehem to make Fournelle whole for the entire ten-day suspension.
. Section 7 of the Act, 29 U.S.C. § 157, provides in full:
§ 157. Right of employees as to organization, collective bargaining, etc.
Employees shall have the right to self-organization, to form, join, or assist labor organizations, to bargain collectively through representatives of their own choosing, and to engage in other concerted activities for the purpose of collective bargaining or other mutual aid or protection, and shall also have the right to refrain from any or all of such activities except to the extent that such right may be affected by an agreement requiring membership in a labor organization as a condition of employment as authorized in section 158(a)(3) of this title.
. Id.
.
See, e.g., Emporium Capwell Co. v. Western Addition Community Org.,
.
See Local 174, Teamsters v. Lucas Flour Co.,
.
See NLRB v. Mackay Radio & Tel. Co.,
. Fournelle testified before the ALJ, apparently without contradiction, regarding the work rule. J.A. at 77-78.
. Because of the particular facts in this case, we are not faced with a situation where an employee has been disciplined for failure to disavow a union-sanctioned unprotected strike.
See United Elec. Workers Local 1113 v. NLRB,
. The ALJ cited Bechtel Corp., note 13 supra. ALJ at 986.
.
See, e.g., Metropolitan Edison Co. v. NLRB,
. This argument simply ignores the principle that a valid waiver of an employee’s rights to engage in concerted activity renders such activity unprotected by the NLRA. Rank-and-file employees may be discharged for disobeying a contractual no-strike clause; there is no reason why a valid provision waiving the rights of union officials should have any different effect.
. Whether the Board has applied the per se rule in this case is unclear. See note 19 infra.
. The Eighth Circuit, in
NLRB v. Armour-Dial, Inc.,
Because the issue of Fournelle’s possible assumption of a leadership role in the strike was not raised before the ALJ or the Board, we will not rely upon it here to justify Fournelle’s selective discipline.
See
29 U.S.C. § 160(e) (“No objection that has not been urged before the Board, its member, agent, or agency, shall be considered by the court, unless the failure or neglect to urge such objection shall be excused because of extraordinary circumstances.”);
NLRB v. Ochoa Fertilizer Corp.,
. J.A. at 36-50. Although the arbitrator’s decision was a part of the administrative record, neither the ALJ nor the Board discussed its possible relevance. Thus, it is impossible to determine whether the Board’s ruling should be interpreted as an application of the per se rule of Precision Castings or as a ruling that an arbitral interpretation cannot provide a valid indication of the parties’ imposition of higher duties on union officials. Either result, as our holding today makes clear, would have been erroneous.
. It is irrelevant that Umpire Seibel did not undertake a chapter-and-verse exegesis of the contractual document in rendering his decision. As the Supreme Court has stated, the arbitrator may fill “[g]aps” in the agreement “by reference to the practices of the particular industry and of the various shops covered by the agreement.”
Steelworkers v. Warrior & Gulf Navigation Co.,
. Of course, if the arbitrator’s award were obscure, or if there were conflicting arbitral rulings, there would be no clear indication of the meaning of the agreement. Lacking such a clear indication, we might be hesitant to uphold the disparate discipline of union officials. See note 15 supra and accompanying text.
The Board has argued that giving effect to the arbitrator’s decision in this case would run afoul of the principle that waivers of employee rights must be undertaken in “clear and unmistakable” terms.
Cf. Mastro Plastics Corp. v. NLRB,
. The court cited
New Orleans Steamship Ass’n v. General Longshore Workers,
*344
The court also cited
Riverboat Casino, Inc. v. Local Joint Executive Bd.,
Our holding today that the Board should have given Umpire Seibel’s award its clear precedential effect does not impair the flexibility of the arbitral process, as would have occurred if the court in Riverboat Casino had set aside the arbitrator’s award. We do not hold that the parties to the collective bargaining agreement in the present case are precluded from arguing in subsequent arbitrations that the arbitrator’s earlier award was erroneous. Just as in the judicial sphere the evolution of the common law may require a court to hold that earlier cases were in error, so an arbitrator may decline to follow arbitral precedent when his judgment is that earlier decisions are erroneous. But that does not give the Board the power to make such a judgment for the arbitrator. See note 21 supra and the discussion of NLRB v. C & C Plywood Corp. in text, infra.
.
Compare Cook Paint & Varnish Co. v. NLRB,
