39 CFR 955.7: (Rule 7) Amendments of pleadings or the record.

(a) On its own initiative or at the request of a party, the Board may order a party to submit a more definite statement of the complaint or answer, or to reply to an answer.

(b) The Board may consider issues not raised in the pleadings that were not objected to during the proceedings. These issues will be treated as if they had been raised in the pleadings. If a party objects to evidence at a hearing because it is not within the issues raised by the pleadings, the Board may nonetheless admit the evidence and grant the objecting party a continuance or other relief if necessary to enable it to respond to such evidence.