The rules of evidence in all hearings under these regulations shall be as set forth in State Government Article, §§10-213 and 10-214, Annotated Code of Maryland. Any party may submit evidence, examine and cross-examine witnesses, and file objections, exceptions, and motions; provided, however, that where a party is represented by counsel, the submission of evidence, examination and cross-examination of witnesses, and filing of objections, exceptions, and motions shall be done and presented solely by counsel. The presiding officer, or any person designated by him for the purpose, may examine any witness called by any party. He may call as a witness any person in attendance at the hearing. Any member of the Board may examine any witness called by any party. The Board shall have the power to compel the attendance of witnesses by subpoena. A member of the Board shall decide a motion for recusal when the basis for the motion is that member’s legal interest or bias. The presiding officer shall decide a motion for recusal, if the basis for the motion is something other than legal interest or bias of another member.