Powers and duties of presiding officer

A presiding officer shall have full authority to control the procedure of a hearing; to admit or exclude testimony or other evidence; and to rule upon all motions and objections. The presiding officer shall make full inquiry into all facts at issue and shall obtain a full and complete record of all facts necessary for a fair determination of the issues. The presiding officer may call and examine witnesses, direct the production of papers and introduce the same into the record of the proceedings.