In this сase, we are confronted with apparently conflicting labor law precedents. The legal issues are significant and require our careful analysis. The case stems from the entry of an order by the National Labor Relations Board (the Board) holding Royal Development Company (Royal) in violation of subsections 8(a)(1), 8(a)(3), and 8(a)(4) of the National Labor Relations Act (the Act), 29 U.S.C. § 158(a)(1), (3), and (4), for its refusal to rehire Schmidt, both because he engaged in union and other protected, concerted activity, and because he filed an unfair labor practice charge against Royal with the Board. The Board ordered Royal to cease and desist frоm its violations, to post appropriate notices, and to reinstate Schmidt with back pay. Royal filed a petition for review under 29 U.S.C. § 160(f); the Board cross-applied for enforcement of its order pursuant to 29 U.S.C. § 160(e). We order enforcement of the Board’s decision on the 8(a)(3) and 8(a)(4) charges, but deny enforcement of its decision on the 8(a)(1) charge.
I
As of early 1978, Royal operated at least six movie theaters, including the King and Queen Theaters. Royal had an agreement with the union, 1 covering its movie projectionists, including employee Schmidt. Under this agreement, a movie projectionist was designated as a regular projectionist, a relief projectionist, or a casual projectionist. A regular projectionist was defined as one who was assigned a minimum of either 30 or 36 hours per week. 2 A relief projectionist was one who was assigned a minimum of three shifts per week, and a casual projectionist was not guaranteed any hours. Grievances were to be filed with the union, although an exception allowed grievances to be filed with the employee’s immediate supervisor.
Miller was Royal’s vice president, and Petroni was Royal’s chief projectionist and the supervisor of all projectionists, including Schmidt. Petroni prepared the work schedules for all of Royal’s projectionists аt all Royal theaters. He also scheduled projectionists for movie theaters other than Royal’s, even though he was employed full-time by Royal. Since the union did not have a hiring hall, Petroni, at the request of the union, used the same list of projectionists for all scheduling.
Schmidt was employed as a regular projectionist by Royal from 1973 until he was laid off in November, 1978, as a result of Royal’s reduced operating schedule. On June 15, 1978, while still employed as a regular projectionist, Schmidt filed a written grievance with Petroni. He complained that although he was scheduled for only 24 to 26 hours per week, Wheeler, another regular projectionist for Royal, was scheduled fоr 50 to 60 hours per week. After Petroni stated that Schmidt had “no right to file grievances,” Schmidt filed the same grievance with Miller. Receiving no response, he sent a second letter to Miller in which he advised Miller that Petroni also worked for a second employer. He sent copies of these grievances to the union business representative. When asked by the administrative law judge (ALJ) whether the grievance was solved under the arbitration provision of the contract, Schmidt stated that the “union sided with the company and ruled against me.”
*366 On July 26, Schmidt filed subsection 8(a)(1), 8(a)(2), and 8(a)(3) unfair labor charges with the Board stating that Royal had reduced his work hours and changed his job classification in response to the grievance and other union activities, and that Petroni, as a member of management, was functioning as the union’s shop steward. The Board dismissed the charges.
In October 1978, Schmidt sent a series of letters to Alameda, the union president, demanding that the union file written grievances because Schmidt was being scheduled for fewer hours than those specified in the agreement for a regular projectionist. On October 13, 1978, Miller wrote to the union explaining that Royal had filled its contractual obligations to Schmidt by offering him shifts at other theaters which would have guaranteed him the required minimum hours per week. The letter further stated that “Mr. Schmidt’s contention represents an attempt to subvert the contract and his continual harassment can no longer be tolerated.”
On November 17,1978, Miller notified the union by letter that, due to discontinuance of operations at some of its theaters, it would be necessary to reduce the number of shifts available to regular projectionists and to eliminate casual and relief projectionists. Schmidt’s position was reduced from a regular to a relief projectionist because he was the last hired. Schmidt was laid off later in November, but Petroni continued to schedule him as a regular projectionist at the Queen Theater, which by then had been sold by Royal.
When Parker, a regular projectionist employed by Royal at the King Theater, became ill, Schmidt was rehired as a casual projectionist to cover some of Parker’s shifts. In July, Ohata, who had more seniority than Schmidt, requested and received one of Schmidt’s shifts. When Parker died, a regular projectionist vacancy was created. Parker’s shifts were given to Ohata. This in effect terminated Schmidt’s employment as a casual projectionist with Royal. On August 4,1979, the Queen Theater was purchased by a new owner and Schmidt’s employment at the theater was discontinued. When Schmidt asked Petroni when he would be scheduled for work, for Royal, Petroni stated he would be unable to schedule Schmidt because Millеr was “fed up” and wanted nothing more to do with him. Petroni also responded that Schmidt had “dragged [Miller] through hell with all that nonsense with the NLRB” for what Miller indicated was no reason.
Schmidt filed a grievance with Miller protesting his termination and requesting that he be reemployed as a regular projectionist. He also requested a meeting with Miller and a union officer to discuss Petroni’s statements and to examine a three inch file that Petroni stated Miller had compiled on Schmidt. In response, Miller told Schmidt that he would not be rehired. Schmidt testified that when he spoke with Petroni on August 18 and on August 25, 1979, he was told that he had performed competently as a projectionist, but that he was not being schеduled because Miller did not want to rehire him.
The ALJ found that Royal violated subsections 8(a)(1), 8(a)(3), and 8(a)(4) of the Act by refusing to rehire Schmidt. The Board concurred with the ALJ.
II
We must enforce the Board’s order if the Board correctly applied the law and if the Board’s findings of fact are supported by substantial evidence in the record viewed as a whole,
Universal Camera Corp. v. NLRB,
Subsection 8(a)(3) provides that it is an unfair labor practice for an employer “by discrimination in regard to hire or tenure of employment or any term or condition of employment to encourage or discourage membеrship in any labor organization[.]” 29 U.S.C. § 158(a)(3). Under subsection 8(a)(4), it is also an unfair labor practice “to discharge or otherwise discriminate against *367 an employee because he has filed charges or given testimony under [the Act.]” 29 U.S.C. § 158(a)(4). These subsections are implicated in Schmidt’s case because the ALJ found that he was discharged for presenting grievances to the union and for filing an unfair labor practice charge with the Board. The crucial question is whether the refusal to rehire was motivated by anti-union animus or instead by legitimate business reasons.
We are confronted first with the question of what standard should be applied to determine the real motive of Royal. The Board employed its
Wright Line
test.
Wright Line, A Division of Wright Line, Inc.,
Until recently, it was clear that we followed the dominant motive test. In
Western Exterminator Co. v. NLRB,
“[t]he test is whether the business reason or the protected union activity is the moving cause behind the discharge.” Stated conversely, “[w]here a party has two motives, one permissible and the other impermissible, the better rule is ... that the improper motive must be shown to have been the dominant one.”
Id.
at 1118,
quoting NLRB v. West Coast Casket Co.,
In 1980, the Board sought to end the apparent confusion in the circuits about the standard for determining motive by announcing a new causation test to be used in all 8(a)(3) cases, as well as in 8(a)(1) cases, which turned on employer motivation. In Wright Line, supra, the Board wrote:
First, we shall require that the General Counsel .make a prima facie showing sufficient to support the inference that protected conduct was a “motivating factor” in the employer’s decision. Once this is established, the burden will shift to the employer to demonstrate that the same action would have taken place even in the аbsence of the protected conduct.
It has recently been observed that there is a conflict among the circuits on the
Wright Line
test.
Red Ball Motor Freight, Inc. v. NLRB,
In the last year, cases in this circuit have followed the
Wright Line
standard in its entirety, thus аpparently departing, at least in part, from our prior pronouncements. Four cases have adopted the standard specifically.
See NLRB v. Brooks Cameras, Inc.,
Trying to reconcile these two lines of cases raises questions of the nаture of our function in relation to that of the Board. The Board argues that the former line of cases has been overruled
sub silencio
by our subsequent cases. Ordinarily a decision of a panel of our court cannot overturn a previous panel decision. The decisions in both
Nevis Industries
and
Zurn Industries,
however, seem to indicate that our only duty was to ascertain whether the Board’s
Wright Line
rule was a reasonably defensible interpretation of the Act consistent with its purposes.
See Zurn Industries, supra,
*369 We do not believe that Iron Workers and Ford Motor Co. v. NLRB are in point. More important, proper consideration of the proposed Wright Line standard requires careful consideration of our purpose in relation to the Board. Such consideration will assist us in interpreting the law of our circuit.
It is true that the Board is free to change its mind and, absent any court rulings, the Board’s latest judgment is entitled to deference.
Iron Workers, supra,
We have found very little law in this arеa, apparently because it has been assumed that circuit courts are bound by their earlier precedent regardless of what the Board has done in the interim.
4
We are assisted by
NLRB v. J. Weingarten, Inc.,
There are also policy reasons for refusing to adopt a Board decision that conflicts with our earlier precedent absent an en banc convening of the court. In effect, the Board would be freе to “reverse” circuit decisions whenever its membership changed, thus relegating the courts of appeals to a minor supervisory role over the Board. This, we believe, would be inconsistent with our appellate process. Therefore, we must be careful not to interpret Nevis Industries and Zurn Industries as overruling Western Exterminator, because neither case was taken en banc.
In light of this, we next examine the two lines of cases to see if they can be reconciled. If the Wright Line standard is consistent with our previous precedent, we are free to adopt it. We will examine first the substantive change developed by Wright Line, and then the procedural change.
As was pointed out above,
Wright Line
adopted a “but for” test for employee discharge cases involving dual motivation. We see no conflict between this test and the dominant motive standard first employed in
Western Exterminator.
Indeed, we have stated several times that the dominant motive and but for standards are essentially equivalent. For example, in
Lippincott Industries, supra,
we stated, “[w]e note in
*370
passing that the Board’s decision in
Wright Line,
while changing the procedural requirements, nonetheless applies a test designed to identify whether protected union activity was the
moving cause
behind the discharge.”
Although the court has previously expressed concern that the two standards may diverge, see Polynesian Cultural Center, Inc. v. N.L.R.B.,582 F.2d 467 , 473-74 (9th Cir.1978), they are equivalent. Thus, we conclude that anti-union animus must be the motivating factor, i.e., the “but-for” cause of the discharge to give rise to an unfair labor practice.
We have more difficulty with
Wright Line’s
procedural standard. The First and Third Circuits rejected the procedural aspects of the
Wright Line
rule because they found the burden shifting to be inconsistent with the Act.
Behring, supra,
We are therefore confronted with two lines of conflicting precedent, one that places the burden of persuasion on the Board and another that places it on the employer after a prima facie showing by the Board. It might be possible to reconcile the two if we could read
Wright Line
as requiring only that the employer come forth with evidence of legitimate business motive, i.e., if he shouldered the burden of production of evidence, but not the burden of persuasion. This interpretation would make the
Wright Line
test similar to the procedural requirements for demonstrating discrimination in a Title VII case.
See Texas Department of Community Affairs v. Burdine,
While we acknowledge this conflict in our circuit’s precedents, we do not need to await its resolution to decide this case. 5 We find that the Board’s rulings on the 8(a)(3) and 8(a)(4) violations are supported by substantial evidence no matter who has the burden of proof.
*371 III
Schmidt filed repeated grievances and he also filed an unfair labor practice charge with the Board. If he was fired because of these activities, Royal violated subsections 8(a)(3) and 8(a)(4) of the Act.
Royal claims, on the contrary, that the real reason for the discharge was that Schmidt’s continual harassment of Petrоni led Miller to fear that Petroni would resign if Schmidt were not discharged. It claims that this is a legitimate business reason and that Schmidt would have been fired regardless of his union activities. To buttress this claim, and to counter the inference that the protected activities led to Schmidt’s discharge, Royal points out that there was a considerable time lag between the protected activities and Schmidt’s discharge and its failure to rehire him. The unfair labor practice charge was dismissed in August 1978, a full year before Schmidt was finally discharged. The last grievance was filed with the union in late 1978, almost nine months before the discharge.
Remoteness in time between protected activities and a decision not to rehire is evidence that the decision was not in retaliation for the protected activities. On the other hand, remoteness in time is not sufficiently probative to disprove discriminatory intent in all circumstances. Here, the inference of illegal motivation is supported by Schmidt’s testimony quoting Petroni’s statement that Miller fired Schmidt because he had “dragged [Miller] through hell with all that nonsense with the NLRB.” This testimony is substantiated by Petroni’s own affidavit which states that “Mr. Miller has told me he has grown tired of all the trouble Schmidt has caused over the years. This trouble has resulted in Schmidt filing grievances against the company as well as charges against the company with the NLRB.” 6 Royal сontends that Miller did not know about these grievances, but this argument is directly refuted by a letter from Miller on October 13,1978 in which he states that Schmidt “had once again filed a grievance” that had no merit. Furthermore, the grievances filed were at least colorably meritorious and apparently brought in good faith. Hence, they are protected under 8(a)(3) whether or not they resulted in formal grievance proceedings.
Even assuming its acts were partially the result of unlawful motives, Royal contends that the real reason that it fired Schmidt was the fear of losing Petroni. Under the Wright Line standard, the argument is that Schmidt would have been fired even absent his filing an unfair labor practice charge with the Board and grievances with the union. This contention, however, is directly contradicted by Petroni’s own statement. Furthermore, the ALJ pointed to evidence which refutes Royal’s contention. First, there is no evidence to show that Petroni was on the verge of quitting. In fact, Petroni told Schmidt that he was willing to offer Schmidt a job except for the fact that the company no longer wanted to employ him. This statement casts doubt on Royal’s claim that Schmidt had to be fired to retain Petroni. It also contradicts other statements by Miller and Petroni that there was no work to be offered. The ALJ also pointed to contradictory evidence offered by Petroni on seniority аnd the activities surrounding the filling of the job created when Parker died.
The ALJ also discovered contradictions in Royal’s position concerning Schmidt’s com
*372
petence. At the time of the discharge, no one told Schmidt that he was not rehired because of incompetence and there was no evidence that Royal thought Schmidt to be incompetent. Later, however, both Petroni and Miller claimed that this was the real reason for the firing. Now Royal argues in its brief that it never questioned Schmidt’s competence. These contradictions give rise to two observations. First, a failure to mention to an employee an asserted reason for adverse action at the time the action is taken can indicate a discriminatory motive for the discharge.
See Great Chinese American Sewing Co.
v.
NLRB,
The ALJ could conclude, based on this record, that the company’s assertion that it only wanted to save Petroni is a mere pretext. Whether or not the asserted reason is a pretext does not сhange our analysis. Although some courts have found a difference between dual motive cases and pretext cases, we have stated that in terms of the legal standard to be applied, the difference between the two is of little importance.
Lippincott Industries, supra,
In conclusion, there is substantial evidence that Royal would not have refused to rehire Schmidt but for his filing grievances with the union and but for his filing an unfair labor practice with the Board. In this case, it does not matter upon whom thе burden of persuasion is placed. Either way, Royal cannot justify its conduct. The Board’s order as to the 8(a)(3) and 8(a)(4) charges is enforced.
IV
This does not end our inquiry, however, for we must also consider the Board’s finding of a violation of subsection 8(a)(1). Subsection 8(a)(1) states that it is an unfair labor practice for an employer “to interfere with, restrain, or coerce employees in the exercise of the rights guaranteed in section 157 . ...” 29 U.S.C. § 158(a)(1). Section 157 states that the Act protects employees’ right “to engage in ... concerted activities for the purpose of collective bargaining or other mutual aid or protection .... ” 29 U.S.C. § 157. Thus, Schmidt is entitled to reinstatement under subsection 8(a)(1) only if he was discharged for engaging in protected, concerted activity.
An employee engages in concerted activity under section 157 when he acts “with or on behalf of other employees, and not solely by and on behalf of . .. himself.”
NLRB v. C & I Air Conditioning, Inc.,
Royal argues that Schmidt was acting only for himself, because there is no evidence that any other projectionists were *373 upset by Petroni’s scheduling. It further argues that Schmidt did not follow the prоper grievance procedure by taking his grievances to the union first, but instead filed his grievances directly with Miller and Petroni. Moreover, to the extent that the union was involved, it refused to process the complaint.
Nevertheless, the Board found that Schmidt was engaged in concerted activity under the
Interboro
doctrine, in that he was seeking to enforce provisions of the collective bargaining agreement. This doctrine was first announced by the Second Circuit in
NLRB v. Interboro Contractors, Inc.,
The
Interboro
doctrine has met with a mixed reaction in the other circuits. The Eighth Circuit has аdopted the doctrine, reasoning that the rights under an agreement, though personal, are concerted because the bargaining agreement is the result of concerted activity by employees for their mutual aid and protection.
NLRB v. Selwyn Shoe Manufacturing Corp.,
The Board argues that
Interboro
is the law of this circuit. It refers us to language from
Adams, supra,
which states that we have adopted the
Interboro
doctrine “in principle.” The Board relies too much on this statement and overlooks the holding of the case. In
Adams
we found that we did not need to apply the
Interboro
doctrine to the facts of that case.
*374
As we stated above, if we accept the
Interboro
doctrine, we must enforce the Board’s finding of an 8(a)(1) violation. Thus, the question whether this circuit will follow the
Interboro
doctrine is now squarely before us for the first time. We reject the
Interboro
doctrine and find that Schmidt was not engaged in protected concerted activity. We agree with the courts which have stated that the
Interboro
doctrine goes beyond the express language of sections 157 and 158. The Act plainly states that an employee must be engaged in concerted activity to invoke its protection. Although it is true that the Board is to be granted deference in its interpretation of the Act, and that its interpretations will be followed on review unless shоwn to be inconsistent with the Act,
see Ford Motor Co. v. NLRB, supra,
Without the aid of the
Interboro
doctrine, there is not substantial evidence in the record as a whole to support Schmidt’s claim that he was engaged in concerted activity. It is clear that Schmidt was acting on his own and that no other employees were upset about Petroni’s scheduling practices. Although Schmidt at times tried to involve the union, the union did not process his grievances and there is no evidence that the union became involved in any of Schmidt’s complaints. Thus, his case is distinguishable from cases in which the union becomes actively involved by processing an employee’s complaint or by helping him present his claim to management.
See Adams, supra,
ENFORCEMENT GRANTED IN PART AND DENIED IN PART.
Notes
. Local No. 665, International Alliance of Theatrical Stage Employees and Moving Pictures Machinе Operators of the United States and Canada, AFL-CIO.
. The contract is contradictory: it defines a regular projectionist as one “who is regularly assigned a minimum of 30 hours per week,” but later states that “[e]ach regular projectionist shall be offered a minimum of 36 hours per week.” The conflict is immaterial in this case because Schmidt claims that he was being scheduled for less than 30 hours a week.
. The only
pre-Wright Line
case to contradict this line of precedent is
NLRB v. Lantz,
.
See, e.g.,
Winter,
Judicial Review of Agency Decisions: The Labor Board and the Court,
1968 Sup.Ct.Rev. 53, 72-73. Professor Winter states that when a court either reverses the Board or affirms it on grounds other than that the Board’s decision was within agency discretion, “a future Board will be precluded from changing the rule because the doctrine of
stare decisis
will lead to judicial reversal of its decision.”
Id.
As pointed out earlier, we have established the test to be employed in employee discharge cases,
Western Exterminator Co. v. NLRB,
. It would be imprudent for us to attempt to resolve this conflict, not only because its resolution is not neсessary to decide this case, but also because the Supreme Court recently granted certiorari in a case that squarely presents the burden-shifting issue.
See NLRB v. Transportation Management Corp.,
. Royal contends that this testimony should be excluded because, at the hearing, Petroni refused to authenticate the page of his affidavit on which this testimony appears. The ALJ refused to credit Petroni’s disclaimer for several reasons: Petroni admitted that a name written on the page was in his own hand; he admitted that initials appearing next to two written modifications on the page were his, although he would not admit writing these initials; the affidavit would not make sense substantively without this page; and Petroni tried to disavow оr mitigate this and other portions of the affidavit although he admitted being instructed to read it carefully before signing and stated that he complied with those instructions. The ALJ’s determinations concerning the credibility of witnesses are given great weight.
Penasquitos Village, Inc.
v.
NLRB,
. The Board also cites
NLRB v. Maxwell,
. We reject the suggestion by some commentators that a violation of 8(a)(3) will automatically be a violation of 8(a)(1). See R. Gorman, Basic Text on Labor Law 132 (1976); see
also
2 J. Jenkins, Labor Law § 7.3 (1968) (“Union activity is the most common form of ‘protected concerted activity’ being included in, but not coextensive with, the latter term.”). It is important to distinguish the two sections because the use of different terminology within a statute generally indicates that Congress intentionally made a differentiation.
See Lankford v. Law Enforcement Assistance Administration,
