(a) Each certificate holder or operator shall test each of its employees who performs a function listed in appendix I to part 121 of this chapter in accordance with that appendix.

(b) No certificate holder or operator may use any contractor to perform a function listed in appendix I to part 121 of this chapter unless that contractor tests each employee performing such a function for the certificate holder or operator in accordance with that appendix.

[Doc. No. 25148, 53 FR 47061, Nov. 21, 1988]