Mr. Justice Douglas
delivered the opinion of the Court.
These cases present a question expressly reserved in NLRB v. Gissel Packing Co., 395 U. S. 575, 595, 601 n. 18 (1969).
In Linden respondent union obtained authorization cards from a majority of petitioner’s employees and demanded that it be recognized as the collective-bargaining representative of those employees. Linden said it doubted the union’s claimed majority status and suggested the union petition the Board for an election. The union filed such a petition with the Board but later withdrew it when Linden declined to enter a consent election agreement or abide by an election, on the ground that respondent union’s organizational campaign had been improperly assisted by company supervisors. Respondent union thereupon renewed its demand for collective bargaining; and again Linden declined, saying that the union’s claimed membership had been improperly influenced by supervisors. Thereupon respondent union struck for recognition as the bargaining representative and shortly filed a charge of unfair labor practice against Linden based on its refusal to bargain.
There is no charge that Linden engaged in an unfair labor practice apart from its refusal to bargain. The Board held that Linden should not be guilty of an unfair labor practice solely on the basis “of its refusal to accept evidence of majority status other than the results of a Board election.” 190 N. L. R. B. 718, 721 (1971).
In Wilder there apparently were 30 employees in the plant, and the union with 11 signed and two unsigned authorization cards requested recognition.as the bargaining agent for the company’s production and maintenance employees. Of the 30 employees 18 were in the production and maintenance unit which the Board found to be appropriate for collective bargaining. No answer was given by the employer, Wilder, and recognitional picketing began. The request was renewed when the two unsigned cards were signed, but Wilder denied recognition. Thereupon the union filed unfair labor practice charges against Wilder. A series of Board decisions and judicial decisions, not necessary to recapitulate here, consumed about seven years until the present decision by the Court of Appeals. The Board made the same ruling as respects Wilder as it did in Linden’s case. See 198 N. L. R. B. 998 (1972). On petitions for review the Court of Appeals reversed. 159 U. S. App. D. C. 228, 487 F. 2d 1099 (1973). We reverse the Court of Appeals.
In Gissel we held that an employer who engages in “unfair” labor practices “ ‘likely to destroy the union’s majority and seriously impede the election’ ” may not insist that before it bargains the union get a secret ballot election. 395 U. S., at 600. There were no such unfair labor practices here, nor had the employer in either case agreed to a voluntary settlement of the dispute and then reneged. As noted, we reserved in Gissel the questions “whether, absept election interference by an employer’s unfair labor practices, he may obtain an election only if he petitions for one himself; whether, if he does not, he must bargain with a card majority if the Union chooses not to seek an election; and whether, in the latter situation, he is bound by the Board’s ultimate determination of the card results regardless of his earlier good faith doubts, or whether he can still insist on a Union-sought election if he makes an affirmative showing of his positive reasons for believing there is a representation dispute.” Id., at 601 n. 18.
We recognized in Gissel that while the election process had acknowledged superiority in ascertaining whether a union has majority support, cards may “adequately reflect employee sentiment.” Id., at 603.
Generalizations are difficult; and it is urged by the unions that only the precise facts should dispose of concrete cases. As we said, however, in Gissel, the Board had largely abandoned its earlier test that the employer’s refusal to bargain was warranted, if he had a good-faith doubt that the union represented a majority. A different approach was indicated. We said:
“[A]n employer is not obligated to accept a card check as proof of majority status, under the Board’s current practice, and he is not required to justify his insistence on an election by making his own investigation of employee sentiment and showing affirmative reasons for doubting the majority status. See Aaron Brothers, 158 N. L. R. B. 1077, 1078. If he does make an investigation, the Board’s recent cases indicate that reasonable polling in this regard will not always be termed violative of § 8 (a)(1) if conducted in accordance with the requirements set out in Struksnes Construction Co., 165 N. L. R. B. [1062], 65 L. R. R. M. 1385 (1967). And even if an employer’s limited interrogation is found violative of the Act, it might not be serious enough to call for a bargaining order. See Aaron Brothers, supra; Hammond & Irving, Inc., 154 N. L. R. B. 1071 (1965). As noted above, the Board has emphasized that not ‘any employer conduct found violative of Section 8 (a)(1) of the Act, regardless of its nature or gravity, will necessarily support a refusal-to-bargain finding,’ Aaron Brothers, supra, at 1079.” 395 U. S., at 609-610.
In the present cases the Board found that the employers “should not be found guilty of a violation of Section 8 (a) (5) solely upon the basis of [their] refusal to accept evidence of majority status other than the results of a Board election.” 190 N. L. R. B., at 721; see 198 N. L. R. B., at 998. The question whether the employers had good reasons or poor reasons was not deemed relevant to the inquiry. The Court of Appeals concluded that if the employer had doubts as to a union’s majority status, it could and should test out its doubts by petitioning for an election. It said:
“While we have indicated that cards alone, or recognitional strikes and ambiguous utterances of the employer, do not necessarily provide such ‘convincing evidence of majority support’ so as to require a bargaining order, they certainly create a sufficient probability of majority support as to require an employer asserting a doubt of majority status to resolve the possibility through a petition for an election, if he is to avoid both any duty to bargain and any inquiry into the actuality of his doubt.” 159 U. S. App. D. C., at 240, 487 F. 2d, at 1111.
To take the Board’s position is not to say that authorization cards are wholly unreliable as an indication of employee support of the union. An employer concededly may have valid objections to recognizing a union on that basis. His objection to cards may, of course, mask his opposition to unions. On the other hand he may have rational, good-faith grounds for distrusting authorization cards in a given situation. He may be convinced that the fact that a majority of the employees strike and picket does not necessarily establish that they desire the particular union as their representative. Fear may indeed prevent some from crossing a picket line; or sympathy for strikers, not the desire to have the particular union in the saddle, may influence others. These factors make difficult an examination of the employer’s motive to ascertain whether it was in good faith. To enter that domain is to reject the approval by Gissel of the retreat which the Board took from its “good faith” inquiries.
The union which is faced with an unwilling employer has two alternative remedies under the Board’s decision in the instant cases. It can file for an election; or it can press unfair labor practice charges against the employer under Gissel. The latter alternative promises to consume much time. In Linden the time between filing the charge and the Board’s ruling was about 4y2 years; in Wilder, about 6% years. The Board’s experience indicates that the median time in a contested case is 388;days. Gissel, 395 U. S., at 611 n. 30. On the other hand the median time between the filing of the petition for an election and the decision of the Regional Director is about 45 days. In terms of getting on with the problems of inaugurating regimes of industrial peace, the policy of encouraging secret elections under the Act is favored. The question remains — should the burden be on the union to ask for an election or should it be the responsibility of the employer?
The Court of Appeals concluded that since Congress in 1947 authorized employers to file their own representation petitions by enacting §9 (c)(1)(B), the burden was on them. But the history of that provision indicates it was aimed at eliminating the discrimination against employers which had previously existed under the Board’s prior rules, permitting employers to petition for an election only when confronted with claims by two or more unions. There is no suggestion that Congress wanted to place the burden of getting a secret election on the employer.
“Today an employer is faced with this situation. A man comes into his office and says, ‘I represent your employees. Sign this agreement, or we strike tomorrow.’ Such instances have occurred all over the United States. The employer has no way in which to determine whether this man really does represent his employees or does not. The bill gives him the right to go to the Board under those circumstances, and say, T want an election. I want to know who is the bargaining agent for my employees.’ ” 93 Cong. Rec. 3838 (1947) (remarks of Senator Taft).
Our problem is not one of picking favorites but of trying to find the congressional purpose by examining the statutory and administrative interpretations that incline one way or another. Large issues ride on who takes the initiative. A common issue is, what should be the representative unit? In Wilder the employer at first took the position that the unit should be one of 30 employees. If it were 18, as the union claimed (or even 25 as the employer later argued), the union with its 13 authorization cards (assuming them to be valid) would have a majority. If the unit were 30, the union would be out of business.
Section 9 (c)(1)(B) visualizes an employer faced with a claim by individuals or unions “to be recognized as the representative defined in §9 (a).” That question of representation is raised only by a claim that the applicant represents a majority of employees, “in a unit appropriate for such purposes.” §9 (a). If there is a significant discrepancy between the unit which the employer wants and the unit for which the union asked recognition, the Board will dismiss the employer’s petition. Aerojet-General Corp., 185 N. L. R. B. 794 (1970); Bowman Bldg. Products Div., 170 N. L. R. B. 312 (1968); Amperex Electronic Corp., 109 N. L. R. B. 353 (1954); Wm. Wood Bakery, Inc., 97 N. L. R. B. 122 (1951). In that event the union, if it desired the smaller unit, would have to file its own petition, leaving the employer free to contest the appropriateness of that unit. The Court of Appeals thought that if the employer were required to petition the Board for an election, the litigable issues would be reduced. The recurring conflict over what should be the appropriate bargaining unit, coupled with the fact that if the employer asks for a unit which the union opposes his election petition is dismissed, is answer enough.
The Board has at least some expertise in these matters and its judgment is that an employer’s petition for an election, though permissible, is not the required course. It points out in its brief here that an employer wanting to gain delay can draw a petition to elicit protests by the union, and the thought that an employer petition would obviate litigation over the sufficiency of the union’s showing of interest is in its purview apparently not well taken. A union petition to be sure must be backed by a 30% showing of employee interest. But the sufficiency of such a showing is not litigable by the parties.
In light of the statutory scheme and the practical administrative procedural questions involved, we cannot say that the Board’s decision that the union should gó forward and ask for an election on the employer’s refusal to recognize the authorization cards was arbitrary and capricious or an abuse of discretion.
In sum, we sustain the Board in holding that, unless an employer has engaged in an unfair labor practice that impairs the electoral process, a union with authorization cards purporting to represent a majority of the employees, which is refused recognition, has the burden of taking the next step in invoking the Board’s election procedure.
Reversed.
At the conclusion of the strike Linden refused to reinstate two employees it alleged to be supervisors and therefore unprotected by the Act. The Board found that to be an unfair labor practice. Thereupon Linden reinstated the two employees and this issue was not tendered to the court below. 159 U. S. App. D. C. 228, 234, 487 F. 2d 1099, 1105 (1973).
Section 8 (a)(5) of the National Labor Relations Act provides:
“(a) It shall be an unfair labor practice for an employer—
“(5) to refuse to bargain collectively with the representatives of his employees, subject to the provisions of section 9 (a).” 49 Stat. 453, as amended, 61 Stat. 141, 29 U. S. C. § 158 (a) (5).
See n. 4, infra.
The long series of rulings is described in the opinion of the Court of Appeals, 159 U. S. App. D. C., at 229-232, 487 F. 2d, at 1100-1103. Wilder did not petition for certiorari. No. 73-1234, which we granted, is the petition of the Board, but for convenience it is referred to herein as the Wilder case.
Thirty-seventh Annual Report of the National Labor Relations Board 13 (1972).
Section 9 (c)(1)(B) provides:
“(1) Whenever a petition shall have been filed, in accordance with such regulations as may be prescribed by the Board—
“ (B) by an employer, alleging that one or more individuals or labor organizations have presented to him a claim to be recognized as the representative defined in section 9 (a);
“the Board shall investigate such petition and if it has reasonable cause to believe that a question of representation affecting commerce exists shall provide for an appropriate hearing upon due notice. Such hearing may be conducted by an officer or employee of the regional office, who shall not make any recommendations with respect thereto. If the Board finds upon the record of such hearing that such a question of representation exists, it shall direct an election by secret ballot and shall certify the results thereof.” 61 Stat. 144, 29 U. S. C. §159 (c)(1)(B).
S. Rep. No. 105, 80th Cong., 1st Sess., 10-11 (1947); 93 Cong. Rec. 3838 (1947).
Section 9 (a) provides:
“Representatives designated or selected for the purposes of collective bargaining by the majority of the employees in a unit appropriate for such purposes, shall be the exclusive representatives of all the employees in such unit for the purposes of collective bargaining in respect to rates of pay, wages, hours of employment, or other conditions of employment . . . 49 Stat. 453, as amended, 61 Stat. 143,29 U. S. C. § 159 (a).
NLRB v. Savair Mfg. Co., 414 U. S. 270, 287 n. 6 (1973) (White, J., dissenting).
We do not reach the question whether the same result obtains if the employer breaches his agreement to permit majority status to be determined by means other than a Board election. See Snow & Sons, 134 N. L. R. B. 709 (1961), enf’d, 308 F. 2d 687 (CA9 1962). In the instant cases the Board said that the employers and the unions "never voluntarily agreed upon any mutually acceptable and legally permissible means, other than a Board-conducted election, for resolving the issue of union majority status.” 190 N. L. R. B., at 721; see 198 N. L. R. B., at 998.