10 CFR 1708.111: Sequestration of witnesses.

(a) Witnesses shall be sequestered during interviews, or during the taking of testimony, unless otherwise permitted by the Investigating Officer(s) or by the Board, as the case may be.

(b) No witness, or counsel accompanying any such witness, shall be permitted to be present during the examination of any other witness called in such proceeding, unless permitted by the Investigating Officer(s) or the Board, as the case may be.