Section 99.21 - Authority of presiding officer(a) The presiding officer shall have the duty to conduct a fair hearing, to avoid delay, maintain order, and make a record of the proceedings. The presiding officer shall have all powers necessary to accomplish these ends, including, but not limited to, the power to:(1) Change the date, time, and place of the hearing, upon due notice to the parties. This authority includes the power to continue the hearing in whole or in part;(2) Hold conferences to settle or simplify the issues in a proceeding, or to consider other matters that may aid in the expeditious disposition of the proceeding;(3) Regulate participation of parties and amici curiae and require parties and amici curiae to state their position with respect to the various issues in the proceeding;(4) Administer oaths and affirmations;(5) Rule on all pending motions and other procedural items including issuance of protective orders or other relief to a party against whom discovery is sought;(6) Regulate the course of the hearing and conduct of counsel therein;(8) Receive, rule on, exclude or limit evidence or discovery;(9) Fix the time for filing motions, petitions, briefs, or other items in matters pending;(10) If the presiding officer is the Assistant Secretary, make a final decision;(11) If the presiding officer is not the Assistant Secretary, certify the entire record including the recommended findings and proposed decision to the Assistant Secretary; and(12) Take any action authorized by the rules in this part or in conformance with the provisions of 5 U.S.C. 551 through 559 .(b) The presiding officer does not have authority to compel by subpoena the production of witnesses, papers, or other evidence.