5 CFR 1203.16 - Proceedings.
The Board has substantial discretion in conducting a regulation review under this part. It may conduct a review on the basis of the pleadings alone, or on the basis of the pleadings along with any or all of the following:
(a) Additional written comments;
(b) Oral argument;
(c) Evidence presented at a hearing; and/or
(d) Evidence gathered through any other appropriate procedures that are conducted in accordance with law.