In this mase we review the finding of the National Labor Relations Board that petitioner, Conoco, Inc., committed an unfair labor practice, in violation of sections 8(a)(1) and (3) of the National Labor Relations Act. 29 U.S.C. §§ 158(a)(1) and (a)(3) (1982). 1 Conoco seeks reversal of the order and the NLRB seeks enforcement.
*812 The parties do not dispute the pertinent facts. Ms. Patricia Fransen was a Conoco employee and was a member of the Oil, Chemical and Atomic Workers International Union AFL-CIO, the collective bargaining representative of the production and maintenance employees. On January 3, 1980, Ms. Fransen became unable to work due to medical reasons and began receiving disability payments pursuant to the Comprehensive Disability Income Plan (the Plan) included in the collective bargaining agreement in effect between Conoco and the Union. On January 8, 1980, the Union commenced a lawful economic strike. Although Ms. Fransen was still in the hospital on January 8, Conoco discontinued her disability payments as of that date. Termination of Ms. Fransen’s disability benefits was purportedly based on subsection 4 of the “Denial of Benefits” section of the Plan, which provides that benefits can be cut off in the following situation:
If benefits are being paid prior to a strike or layoff, such benefits will cease for the duration of such strike or layoff. No benefits will be paid during the time you are on strike or layoff.
Record, vol. 2, at 604-05.
Conoco sent a letter to its striking employees on January 15, which reminded them that “coverage under the [Plan] is discontinued for employees on strike.” Record, vol. 2, at 610-12. On February 20, while still on disability, Ms. Fransen began actively participating in the strike by picketing for the Union. Ms. Fransen’s doctor authorized her to return to work commencing March 25, 1980. The strike ended on April 1, 1980, and the employees returned to work on April 2nd.
The NLRB filed a charge alleging that termination of Ms. Fransen’s disability benefits constituted an unfair labor practice. After a hearing, the Administrative Law Judge found that the NLRB’s general counsel had made out a prima facie case that Conoco had violated 8(a)(1) and (3) by terminating Ms. Fransen’s benefits. He rejected Conoco’s defense, which was predicated largely on subsection 4 of the “Denial of Benefits” section of the Plan. The AU assumed for the purpose of his decision that the Union had agreed to that subsection and that it was not an illegal provision. However, he found the provision so ambiguous that it could not be said clearly to apply to Ms. Fransen. Rather, he found from the provision’s second sentence and Conoco’s January 15 letter to its employees, that the restriction on the payment of benefits under the Plan applied only to those employees who were “on strike.” Because the AU concluded that while hospitalized Ms. Fransen could not be “on strike,” he found that the subsection on which Conoco relied did not apply to her.
Relying on the NLRB’s decision in
E.L. Wiegand Division, Emerson Electric Co.,
On appeal to the Board, the Board agreed that discontinuance of Ms. Fran-sen’s disability pay on January 8, 1980, was an unfair labor practice. However, the
*813
Board ordered Conoco to make Ms. Fran-sen whole by paying her-the disability from January 9 through March 24, 1980, the last day she was medically disabled, and to post an appropriate notice. The Board adopted the Third Circuit’s modification of
E.L. Wiegand Division, Emerson Electric Co.,
On appeal to this court, Conoco does not challenge the NLRB’s position as to the appropriate remedy. Rather, Conoco argues that the Board improperly assumed that the disability benefits were “accrued” benefits, and that the record does not contain substantial evidence to support such a finding. Further, Conoco contends that it had a legitimate business justification for withdrawing the disability payments and therefore did not commit an unfair labor practice.
Our standard of review is whether the Board’s findings of fact are supported by substantial evidence.
Universal Camera Corp. v. NLRB,
The unfair labor practice charged here is grounded primarily in section 8(a)(3), 29 U.S.C. § 158(a)(3) (1982), which specifically requires proof that disparate treatment has been accorded union members and that the employer's action is likely to discourage participation in union activities. While not all employer actions which might have the effect of discouraging union membership are illegal, actions that are motivated by anti-union animus are illegal.
Metropolitan Edison Co. v. NLRB,
Where there is only circumstantial evidence of anti-union animus, the Supreme Court has set out a two-prong standard of proof for determining whether the employer has committed an unfair labor practice.
First, if it can reasonably be concluded that the employer’s discriminatory conduct was “inherently destructive” of important employee rights, no proof of an anti-union motivation is needed and the Board can find an unfair labor practice even if the employer introduces evidence that the conduct was motivated by business considerations. Second, if the adverse effect of the discriminatory conduct on employee rights is “comparatively slight,” an anti-union motivation must be proved to sustain the charge if the employer has come forward with evidence of legitimate and substantial busi *814 ness justifications for the conduct. Thus, in either situation, once it has been proved that the employer engaged in discriminatory conduct which could have adversely affected employee rights to some extent, the burden is upon the employer to establish that he was motivated by legitimate objectives since proof of motivation is most accessible to him.
NLRB v. Great Dane Trailers, Inc.,
In
Great Dane,
the Court held that a refusal to pay accrued benefits to those participating in an economic strike was an unfair labor practice, even absent proof of an improper motivation by the employer. The Court agreed with the Board's charge that the employer’s policy relating to vacation pay clearly concerned a “term or condition of employment.” Since the employer allegedly discriminated between striking and non-striking employees with regard to that condition of employment, the complaint stated “an unfair labor charge in simplest terms.”
Id.
at 30 & n. 7,
Conoco argues that there was no unfair labor practice here because, unlike Great Dane, the benefit withdrawn was not ac-that, at the least, such an action adversely crued and Conoco had a legitimate and substantial business justification for withdrawing the benefit. Conoco also contends that the withholding of disability pay benefits during an economic strike is not “inherently destructive” of an employee's rights, and thus there was no unfair labor practice under either of the Great Dane standards of proof. We do not need to reach this latter contention because even under the second part of the Great Dane test, we find that the evidence presented is not as a matter of law sufficient to establish a business justification. Thus, the Board was not required to make a specific showing of anti-union animus. We conclude that the Board properly found that Conoco committed an unfair labor practice, the Board properly found that the withheld benefits were accrued, and properly rejected Conoco’s attempt to establish a business justification.
The test for whether benefits are accrued
2
is “whether they are due and payable on the date on which the employer denied them.”
E.L. Wiegand Division, Emerson Electric Co. v. NLRB,
*815
What factors are relevant to whether particular benefits are “due and payable on the date on which the employer denied them” may differ in each case. While both of the factors discussed in
Emerson
are relevant here, they do not provide a definitive determination of whether Ms. Fran-sen’s disability benefits were accrued. Rather, whether the benefits here were due and payable on the date denied, and therefore accrued, depends on the interpretation of the contract provision governing denial of disability payments in the event of a strike. Ms. Fransen was receiving disability benefits from January 3 through January 7, 1980. She was still on disability the day the Union went on strike and her disability payments were terminated. Unless some contract provision waived Ms. Fran-sen’s right to continue receiving disability, the benefits were also due and payable on January 8, continuing through the time she was released from disability. While a union may bargain away a member’s statutorily protected rights, waiver of a protected right must be expressed clearly and unmistakably. Waiver will not be inferred, but must be explicit.
Metropolitan Edison Co. v. NLRB,
The Board and the AU interpret the contract language differently than does Conoco. The Board and the AU construe it to mean that only employees who are “on strike” are denied disability benefits. As long as an employee is disabled before the strike began, that employee is not on strike until released' from disability,
Emerson,
Under the
Great Dane
test, if the employer presents evidence of a legitimate and substantial business justification for withholding accrued benefits, the NLRB must then prove anti-union animus. Conoco argues that it established a sufficient justification in that it reasonably interpreted and in good faith relied on the terms of the Plan. In support of its position, Conoco relies on
NLRB v. Borden, Inc., Borden Chemical Division,
We do not dispute these general principles. However, in light of our previous discussion as to whether the Union had waived the rights of both striking and nonstriking employees, and Conoco’s own interpretation of the contract provision as evidenced by its January 15 letter, we find that there is substantial evidence to support a finding that Conoco did not reasonably believe it had the right to terminate Ms. Fransen’s disability payments.
*816 Thus, we find that there is substantial evidence to support the Board’s conclusion that Conoco committed an unfair labor practice.
The Board’s order as to Ms. Fransen, as well as the Board’s order finding a violation of the National Labor Relations Act for improperly disciplining four employees accused of picket line misconduct, 3 is enforced.
Notes
. Sections 8(a)(1) and 8(a)(3) provide:
(a) 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;
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(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 ____
29 U.S.C. §§ 158(a)(1) and (a)(3) (1982). Section 7 of the Act provides:
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____
29 U.S.C. § 157 (1982).
. It is not altogether clear whether accrual versus non-accrual of a benefit is the key to analyzing these cases. In the Third Circuit’s review of the
Emerson
case, the court carefully analyzed whether the benefits in question were accrued.
. Conoco did not seek review of the portion of the Board’s order finding a violation with respect to the improper discipline of the employees accused of picket line misconduct.
