29 U.S.C. § 629

Criminal penalties

Whoever shall forcibly resist, oppose, impede, intimidate or interfere with a duly authorized representative of the Equal Employment Opportunity Commission while it is engaged in the performance of duties under this chapter shall be punished by a fine of not more than $500 or by imprisonment for not more than one year, or by both: Provided, however , That no person shall be imprisoned under this section except when there has been a prior conviction here­under.

( Pub. L. 90–202, § 10 , Dec. 15, 1967 , 81 Stat. 605 ; 1978 Reorg. Plan No. 1, § 2, eff. Jan. 1, 1979 , 43 F.R. 19807, 92 Stat. 3781 .)