Briefs [Rule 23].

(a) Generally. The Board may order or invite briefs on any issue in a case at any time. Briefs shall be formatted for 8.5 by 11-inch paper, double spaced, with body and footnote text no smaller than 13 point. (b) Prehearing, post-hearing, and other briefs. Prehearing and post-hearing briefs, briefs filed under Rule 19, and briefs on non-procedural motions shall cite record evidence for factual statements and legal authority for legal arguments.