(a) Following the submission of evidence at an oral hearing, the parties may file a brief, proposed findings of fact and conclusions of law, or both, or, in the ALJ's discretion, make oral arguments.

(b) Unless otherwise ordered by the ALJ, briefs and proposed findings of fact and conclusions of law shall be filed simultaneously by all parties. In Fair Housing Act cases, such filings shall be due not later than 45 days after the adjournment of the oral hearing. In other cases, they shall be due as the ALJ orders.