(1) A petitioner, or a moving party when a motion has been filed, shall submit a brief addressing each legal issue it expects the board to determine. Failure by such a party to brief an issue shall constitute abandonment of the unbriefed issue. Briefs shall enumerate and set forth the legal issue(s) as specified in the prehearing order.

(2) Briefs shall be filed according to the schedule in the prehearing order or any subsequent order amending the briefing schedule.

(3) Clarity and brevity are expected to assist the board in meeting its statutorily imposed time limits. A presiding officer may limit the length of a brief and impose format restrictions.