(a) Separation of functions. (1) The Administrative Law Judge and the technical staff shall not be responsible for or subject to the supervision or direction of any person who participated in the endangered species consultation at issue;

(2) The Secretary shall not allow an agency employee or agent who participated in the endangered species consultation at issue or a factually related matter to participate or advise in a determination under this part except as a witness or counsel in public proceedings.

(b) Ex parte communications. The provisions of 5 U.S.C. 557(d) apply to the hearing and the preparation of the report.