Wilder Construction appeals the decision by the National Labor Relations Board (NLRB) holding that the company’s unilateral withdrawal of recognition of the union representing its workers interfered with the employees’ right to bargain through representatives of their own choosing and constituted a breach of the company’s corollary duty to bargain, in violation of sections 8(a)(1) and 8(a)(5) of the National Labor Relations Act. 29 U.S.C. §§ 158(a)(1) & (a)(5) (1982). The NLRB also found that the company’s subsequent refusal to provide the union with the information it requested regarding employees in the bargaining unit violated the Act. The NLRB’s decision and order were based upon substantial evidence; the order is enforced.
Facts
In 1974, Wilder Construction recognized General Teamsters Local No. 231, International Brotherhood of Teamsters, Chauffeurs, Warehousemen and Helpers of America, as the exclusive collective bargaining representative of a unit that includes truckdrivers, mechanics, and ware-housemen. The company entered into successive collective bargaining agreements after that time, the most recent being an agreement from June 1,1980, through May 31, 1983. The union and company met on several occasions to discuss terms of a new contract but failed to reach agreement.
The union began a strike on August 29, 1983. On that date, the company employed 14 people in the bargaining unit. All were *1124 members of the union and all joined the strike. During the first three weeks of the strike, the company hired 12 permanent replacements. Sometime prior to October 11, 1983, 3 of the 14 union members crossed the picket line and returned to work.
On October 11, the company notified the union by letter that it was withdrawing recognition. The company asserted in its letter that it had a good faith doubt that the union commanded the support of a majority of the bargaining-unit employees. After that time, Wilder refused the union’s requests to bargain.
On November 18, the union made an unconditional offer to return to work on behalf of the striking employees. The company answered that it had permanently replaced the employees, but offered to place any of them so desiring on a preferential hiring list. Five striking employees accepted the company’s offer.
Almost six months later, on May 11, 1984, the union requested a list of the names, social security numbers, addresses, dates of hire and termination, if applicable, of the bargaining-unit employees. Wilder refused to furnish the requested information.
Based upon these facts, the National Labor Relations Board found that the company violated sections 8(a)(1) and 8(a)(5) of the National Labor Relations Act by withdrawing recognition from, and refusing to bargain with, the union. The NLRB also found that the refusal to provide the union with the requested information violated the Act.
Discussion
1. General Framework for Withdrawal of Recognition Claims
Once a union is certified by the NLRB or recognized by the employer, the union is conclusively presumed to command majority allegiance for a reasonable period; after such period, there is a rebuttable presumption of majority support.
See Mingtree Restaurant, Inc. v. NLRB,
*1125
The test for establishing a good faith doubt is an objective one. Evidence in support of that defense must “unequivocally indicate that union support had de-_ dined to a minority.”
NLRB v. Silver Spur- Casino,
2. The NLRB’s Findings
a. The number of employees in the unit
The NLRB found that as of the date on which the company withdrew recognition the unit was comprised of 26 employees— the fourteen original workers and the twelve permanent replacements. Based upon its contention that four of the union members had permanently left the unit, the company asserts that by October 11 the unit was comprised of only 22 people. The employer’s burden with respect to issues regarding the composition of the unit is the same as that which applies to all other aspects of its defense — its evidence must be “clear, cogent, and convincing.”
1) Retired workers
Wilder contends that three of the union employees retired and were no longer part of the bargaining unit. The NLRB found, however, that the evidence presented was “far too equivocal” to establish Wilder’s knowledge of the retirement of the three employees before it withdrew recognition from the union. Because the employer must have such knowledge
before
the withdrawal of recognition, any information acquired after withdrawal is not relevant.
See N.T. Enloe Memorial Hospital v. NLRB,
2) Employee who found work elsewhere
The company also asserts that the NLRB erred by counting as a part of the bargaining unit one striker who allegedly found permanent employment elsewhere. The NLRB held, however, that Wilder had failed to demonstrate that the striker accepted the new employment before its withdrawal of recognition. The company’s operations manager testified that the employee in question went to work for another company either during the strike or shortly thereafter. Because the strike continued for more than a month after the withdrawal of recognition, the NLRB found that the company failed to establish that the employee’s alleged acceptance of permanent employment occurred on or before the date of withdrawal. Thus, facts introduced by the company fell far short of meeting the strict test applicable when a “good faith doubt” defense is asserted.
3) Conclusion
The NLRB’s determination • that on the relevant date the bargaining unit consisted of 26 employees, the 14 original strikers *1126 and the 12 permanent replacements, is supported by substantia] evidence.
b. The allegiance of the three returning strikers who crossed the picket lines
Because the unit consisted of 26 workers, in order to establish a good faith reasonable doubt as to the union’s majority status Wilder was required to show by clear, cogent, and convincing evidence that it had knowledge of facts that would unequivocally demonstrate that more than 13 workers had rejected the union’s representation. Thus, even were we to assume — contrary to authoritative precedent — that none of the permanent replacements supported the union, the company had the burden of showing its knowledge of facts that would prove that at least some of the original workers had disavowed the union as their bargaining representative.
Cf Pennco, Inc.,
The mere refusal to support a strike is not tantamount to a rejection of union representation.
See NLRB v. Top Manufacturing Co., Inc.,
Because workers may resign union membership during a strike in violation of a union’s internal rules,
Pattern Makers’ League v. NLRB,
The NLRB’s determination that the workers involved did not reject the union’s representation by their mere crossing of the picket line is supported by substantial evidence. 3 Knowledge on the part of an employer of the crossing of picket lines by employees is insufficient to give rise to a good faith doubt as to the allegiance of those employees to the union for purposes of collective bargaining. Any other holding would endanger the section 7 rights of striking workers as well as workers who do cross the picket line.
CONCLUSION
The NLRB’s finding that the union maintained majority support in the 26 member bargaining unit is supported by substantial evidence. The company failed to meet the good faith doubt test. Consequently, Wilder’s refusal to bargain and its denial of the union’s request for information each constitute unfair labor practices in violation of the Act.
ORDER ENFORCED.
Notes
. We note that even where the employer meets the presumption of union majority support by presenting evidence establishing a good faith reasonable doubt as to the union’s majority status, the employer has not necessarily presented a complete defense on the merits. Technically, once the employer meets the presumption, the "burden then shiftfs] to the Board to prove that the Union represented a majority on the day the [company] refused to bargain.”
Dalewood Rehabilitation Hospital, Inc. v. NLRB, 566
F.2d 77, 80 (9th Cir.1977). The General Counsel may present evidence establishing the unfair labor practice even though the employer has succeeded in overcoming the presumption. However, because the General Counsel usually rests on the presumption alone, as he did in this case, the employer’s rebuttal of the presumption is often enough to permit it to prevail on the merits.
See generally Atlanta Journal Company,
. We do not intend to indicate any doubt as to the validity of the established rule of Pennco. Since the Board, however, chose not to rest its decision on Pennco, we do not think it appropriate — or necessary in this case — to rely on that decision.
. The NLRB properly rejected Wilder’s contention that the workers’ crossing of the line sometime after the occurrence of picket line violence evidenced rejection of union representation.
The existence of picket line violence, standing alone, will not ordinarily be held to be the basis for inferring a rejection of union representation by those who work behind the line.
See IT Services,
