The National Labor Relations Board (Board) petitions this court to enforce an *502 order directed against the respondent, Local Union 323 of the International Brotherhood of Electrical Workers (Union), for an alleged unfair labor practice in violation of § 8(b)(1)(B) of the National Labor Relations Act, 29 U.S.C. § 158(b)(1)(B). We enforce the order.
The facts are essentially undisputed. In 1970, John Willey, a longtime member of the International Brotherhood of Electrical Workers (IBEW), moved to Palm Beach County, Florida. He obtained a work permit from the local IBEW chapter, Local 323, and secured an electrician’s job through the Union’s hiring hall. He retained his official membership with his former local chapter of the IBEW in Terre Haute, Indiana.
In 1974, Willey passed the county’s master electrician examination and received a certificate of competency. This authorization enabled him either to operate as a contractor or to apply for the required electrical permits on behalf of other contractors. Soon after acquiring master electrician status, Willey and a partner formed their own electrical contracting business. At that time, he allowed his working permit with the local Union to expire, although he continued to pay membership dues.
The following year, Willey sold his business and accepted a position as the electrical superintendent for Drexel Properties, Inc. (Drexel). Drеxel is engaged in land development and residential and warehouse construction. The company is a nonunion employer and has no contract with Local 323. In his capacity as superintendent, Willey supervises all of the electrical contracts performed in the company’s construction projects. His responsibilities include the hiring and firing of electricians, handling employee complaints concerning working conditions and equipment safety, imposing disciрlinary sanctions, making work assignments, and approving vacation requests. Additionally, he utilizes his master’s certificate to obtain county permits on behalf of Drexel. By law, he is required to accept supervisory responsibility for all electrical work performed pursuant to those permits. As compensation, Willey receives a salary; he does not share in Drexel’s profits nor does he hold any ownership interest in the company.
In 1977, the business manager of Local 323 prefеrred written charges against Willey, accusing him of “running a nonunion electrical contracting business.” He charged that Willey had violated the IBEW Constitution. 1 During the ensuing trial, Willey and the Union officials discussed the fact that he secured electrical work permits for Drexel through the use of his master’s certificate. The trial board informed him that this practice violated the working agreement between Local 323 and area union employers. 2 One member advised Willey to quit his job and leave the аrea. 3 *503 Soon afterward, Willey was found guilty of violating the two constitutional provisions and was fined $1,000.00 for each infraction. In a letter to Willey, the tribunal agreed to suspend part of the fine if he would “get right with the Local Union within 30 days and commit no further violations for a period of one year.”
Willey then appealed to an International Vice President of the Union. That official affirmed the trial board’s decision and noted that Willey had not contested the fact that he was “emрloyed by a firm who does not have an agreement with Local 323.” He also pledged to reduce the fines, contingent upon Willey’s “immediate cessation of •the violation.” Subsequently, Willey continued to pursue his appeal in correspondence to various IBEW officers.
Before the Union ever informed Willey that he had exhausted his appeals, another member of Local 323 filed new accusations against him citing the same two constitutional provisions as the earlier charge, and also claiming a violation of the area working agreement. Willey was adjudged guilty of all three violations and fined an additional $5,150.00. The union offered to suspend the second set of fines if Willey would pay the fine outstanding on the first charge. Insisting that he was still appealing the original decision and that he intended to appeal the second set of charges, he refused. Consequently, the trial board expelled Willey from membership in the IBEW.
As a result of these actiоns, the Union was charged with an unfair labor practice, i.e., a violation of § 8(b)(1)(B), which proscribes the restraint or coercion of an employer in the selection of his representative for the purposes of collective bargaining or the adjustment of grievances. After a hearing, the Administrative Law Judge (ALJ) found that the 1977 fines were imposed for “working for a nonunion contractor.” The AU also concluded that the second set of violations concerned his assoсiation with a nonunion employer and his use of his master’s certificate for the benefit of Drexel. In his view, these sanctions constituted unlawful coercion under § 8(b)(1)(B). The ALJ rejected the Union’s contention that the statute did not apply to its conduct because Willey was an employer. Based on these findings, the ALJ recommended a cease and desist order enjoining further violations, as well as various types of affirmative relief.
The Union filed exceptions to the AU’s findings. On review, the Natiоnal Labor Relations Board adopted all of the AU’s pertinent findings and conclusions of law. The Board members unanimously agreed that the union acted in violation of § 8(b)(1)(B) by disciplining Willey for his employment with a nonunion firm. A majority of the Board also characterized the fine imposed for using the master’s certificate as “part and parcel of the same violation.” One member, however, expressed a contrary view. The Board now seeks to enforce its order.
Section 8(b) provides in pertinent part that “[i]t shall be an unfair labor practice for a labor organization or its agents — (1) to restrain or coerce ... (B) an employer in the selection of his representatives for the purposes of collective bargaining or the adjustment of grievances.” Since the 1968 decision in
San Francisco-Oakland Mailers’ Union No. 18,
The Court in
Florida Power & Light
faced the issue whether punitive measures taken by a union against supervisory personnel for crossing picket lines to perform duties customarily undertaken by rank-and-file employees contravened § 8(b)(1)(B). Without repudiating the
San Francisco-Oakland Mailers’
doctrine, the Court refused to extend the statute to immunize a supervisor’s performance of rank-and-file work.
Id.
at 805,
[t]he conclusion is thus inescapable that a union’s discipline of one of its members who is a supervisory employee can constitute a violation of § 8(b)(1)(B) only when that discipline may adversely affect the supervisor’s conduct in performing the duties of, and acting in his capacity as, grievance adjuster or collective bargainer on behalf of the employer.
Id.
at 804-05,
In
American Broadcasting Cos.,
the Court had occasion to consider the implications of its holding in
Florida Power & Light.
The union involved in that case ordered its supervisory members not to cross picket lines, even to perform their supervisory duties. Some of the members obeyed the directive, and the ones who did not were subsequently penalized by the union. In its evaluation of the legality of the union’s actions, the Court reiterated the inquiry originally formulated in
Florida Power & Light.
Union discipline of a supervisor contravenes § 8(b)(1)(B) if that coercion “may adversely affect” his performance of grievance adjustment or collective bargaining responsibilities.
American Broadcasting Cos.,
To illustrate, the Court cited with approval
New Mexico District Council of Carрenters and Joiners of America (A.S. Homer, Inc.),
Against this background, the Union’s disciplinary sanctions and eventual expulsion of Willey constitute unlawful coercion. The ALJ found, based on uncontroverted testimony, that Willey had extensive grievance adjustment responsibilities in his capacity as Drexel’s electrical superintendent, As previously noted, Willey had numerous duties — such as handling complaints of conditions and safety at the work site— requiring settlement of the individual problems of the employees under his supervision. Because he was fined for his affiliation with a nonunion company, “compliance .. . with the union’s demands would have ‘the effect of depriving the Company of the services of its selected representаtive for the purposes of collective bargaining or the adjustment of grievances.’ ”
American Broadcasting Cos.,
Nevertheless, the Union advances several reasons why the prohibition should not apply to its actions in this case. First, it argues that, because it did not represent Drexel’s emрloyees, the sanctions against Willey were an internal union matter, and not an attempt to coerce his employer. As support for this position, it relies on
NLRB v. International Brotherhood of Electrical Workers, Local 73 (Chewelah Contractor’s, Inc.),
In
Chewelah,
the court held that a union does not act contrary to § 8(b)(1)(B) if it neither represents nor displays a representational interest in the company’s employees.
The court further observed that in all the § 8(b)(1)(B) decisions it had reviewed, the union had been the bargaining representa *506 tive of the company’s employees. 5 Id. at 1037. Because it did not have such a representational interest, the union lacked any “incentive to either influence Chewelah’s choice of bargaining representatives or affect [the supervisor’s] lоyalty to Chewelah.” Id. (emphasis added). Finally, characterizing the discipline as an internal union affair, the court emphasized that the penalized member always retained the option of resigning from the union. 6 Id. For these reasons, the court announced that “[a] union does not violate Section 8(b)(1)(B) by disciplining a member, even though that member is also the bargaining representative of an employer, if the union neither represents nor shows an intent to represent the emplоyer’s employees.” 7 Id.
In this case, the Union invites us to engraft the same limitation on our interpretation of the statute.
8
We decline to do so. Our reading of the statute, and the two Supreme Court decisions construing it, does not support such a restrictive application. Most significantly, contrary to the
Chewelah
court’s suggestion, a § 8(b)(1)(B) violation does not hinge on the union’s incentive or intent in disciplining a supervisory member. Rather, the statute proscribes any union pressure which “may adversely affеct” the supervisor’s performance of the protected duties.
American Broadcasting Cos.,
*507
Placing the emphasis on the effect caused by the union’s actions, rather than its intent, is more consistent with the fundamental purpose of the statute. Congress’ overriding concern in enacting § 8(b)(1)(B) was to insulate an employer’s
selection
of his collective bargaining or grievance adjustment representative from union influence or interference.
See, e.g., Florida Power & Light,
Next, the Union attempts to escape the dictates of the statute by characterizing Willey as an “employer.” The Union reasons that the use of the master’s certificate to obtain electrical permits is a responsibility more akin to an employer, rather than a supervisory, function. Then, claiming that it disciplined Willey primarily for his use of the certificate, the Union urges that the statute does not condemn sanctions imposed on a member for engaging in strictly employer activities.
It is true that the Board has consistently held § 8(b)(1)(B) inapplicable in cases where the member is the owner of the business.
See, e.g., Glaziers and Glassworkers, Local 1621,
The Union’s assertion that Willey’s mere use of the master’s certificate places him within the ambit of this rule misconstrues its rationale. Essentially, the Union confuses ownership with management duties. Supervisory persоnnel, by their very nature, often undertake numerous tasks closely associated with an employer’s role, such as Willey’s acquisition of electrical permits in this ease. In effect, a supervisor acts as a managerial agent for the employer. However, this responsibility does not necessarily create the personal stake inevitably present when the individual possesses a financial interest in the company. Without that participation, there is no assurance that union pressure will not adversely affect the supervisor’s performance of his collective-bargaining and grievance-adjustment duties. Thus, managerial responsibility, standing alone, does not negate the applicability of § 8(b)(1)(B).
On that basis, the Union’s argument must fail. The uncontroverted testimony before the AU established that Willey owned no stock or other financial interest in Drexel. Without such a personal stake, his responsibility in obtaining electrical permits does not justify an exemption from the statute’s coverage. 10
The order of the Board is ENFORCED.
Notes
. The constitutional provisions cited in the charge were Article XXVII, § 1, subsections 10 and 21:
ARTICLE XXVII
MISCONDUCT, OFFENSES AND PENALTIES
sec. 1. Any member may be penalized for committing any one or more of the following offenses:
(10) Working in the interest of any organization or cause which is detrimental to, or opposed to, the I.B.E.W.
(21) Working for any individual or company declared in difficulty with a L.U. or the I.B. E.W., in accordance with this Constitution.
. The pertinent provision of the area working agreement reads,
ARTICLE II
EMPLOYER RIGHTS — UNION RIGHTS
Sеction 2.01. No member of the International Brotherhood of Electrical Workers, or other employees, subject to employment by employers operating under this agreement, shall himself become an employer for the performance of any electrical work. Any member, or other employee, possessing a masters license while employed under the terms of this agreement, shall maintain same on an inactive status. Any employer working under this agreemеnt shall not take out a permit or master a job for any other person or firm, except in the case of a true joint venture.
. During the subsequent hearing before an Administrative Law Judge (ALJ), the officer denied having ever made that remark. The ALJ, however, credited Willey’s account of the conversation. We may not disturb a finding based
*503
upon a credibility determination. See
NLRB v. Pope Maintenance Corp.,
. We note, however, that the Supreme Court has rejected the notion that Congress intended § 8(b)(1)(B) to guarantee a supervisor’s loyalty.
See Florida Power & Light,
. The court did not mention
A.S. Homer,
or the Supreme Court’s tacit approval of that case in
American Broadcasting Cos.
In
A.S. Horner,
the union had lost two reрresentation elections and did not represent the company’s employees at the time of the imposition of the sanctions.
. On the contrary, the Supreme Court has suggested that the option of terminating one’s union membership does not alleviate the unlawful сoerciveness of a union’s sanctions.
American Broadcasting Cos.,
. Testimony at the hearing suggested that Local 323 may indeed have had an interest in representing Drexel’s employees. Hearing Transcript at 44, 194, 403-05, 422. If so, the union’s assessment of a penalty against Willey violated the statute even under the test posited by the Ninth Circuit. The ALJ and the Board, however, made no finding on the issue.
. The Board claims that the Union has foreclosed our consideration of this argument because it did not raise the defense during the administrative proceedings. See 29 U.S.C. § 160(e). To the contrary, the Union preserved the contention in its exceptions to the ALJ’s decision, which were submitted three months prior to the Ninth Circuit’s issuance of the Chewelah opinion. There, the Union emphasized that it did not represent Drexel’s employees, thereby rendering the sanction an internal union matter outside the scope of § 8(b)(1)(B).
. In American Broadcasting Cos., Justice Stewart in dissent underscоred this implication of the majority’s holding. As he observed,
[i]n the present cases it is entirely clear that the union had no interest in restraining or coercing the employers in the selection of their bargaining or grievance adjustment representatives, or in affecting the manner in which supervisory employees performed those functions. As the Court notes, ... the union expressed no interest at the disciplinary trials in the kind of work that was done behind its picket lines. Its sole purpose was to enforce the trаditional ¡kinds of rules that every union relies on to maintain its organization and solidarity in the face of the potential hardship of a strike.
. Implicit in this approach is a related contention based on the Union’s characterization of the master’s certificate as an “employer function.” It essentially claims that since
Florida Power & Light
construes the statute only to prohibit sanctions imposed for the exercise of
*508
supervisory duties, and use of the master’s license is an employеr rather than a supervisory undertaking, discipline for that purpose does not offend § 8(b)(1)(B). As previously noted, we are unconvinced by the Union’s attempt to distinguish between employer and supervisory functions, in that the distinction ignores the inherently managerial nature of a supervisor’s role. Moreover, mere labels do not control the existence or absence of a violation.
See American Broadcasting Cos.,
