32 C.F.R. § 1605.81 – Interpreters.

(a) The local board, district appeal board and the National Selective Service Appeal Board are authorized to use interpreters when necessary.
(b) The following oath shall be administered by a member of the board or a compensated employee of the System to an interpreter each time he or she interprets:
Do you swear (or affirm) that you will truly interpret in the matter now in hearing?
(c) Any interpreter who fails to respond in the affirmative shall not be permitted to function in this capacity.

[47 FR 4644, Feb. 1, 1982, as amended at 52 FR 24454, July 1, 1987]