29 CFR 452.34: Application of section 504, LMRDA.

The eligibility of members of labor organizations to be candidates and to hold office in such organizations is subject only to the provisions of section 504(a), which bars individuals convicted of certain crimes from holding office in labor organizations 23 and to reasonable qualifications uniformly imposed. A person who is barred from serving in union office by section 504(a) is not eligible to be a candidate. However, a labor organization may permit a person who is barred from holding union office by section 504(a) to be a candidate for office if the section 504 disability will terminate by the customary date for the installation of officers. A labor organization may within reasonable limits adopt stricter standards than those contained in section 504(a) by extending the period of disability or by barring from union office persons who have been convicted of crimes other than those specified.