The examiner shall have the power to prescribe rules for the scheduling and conduct of hearings and other procedural matters related to the duties of his office. Such rules shall provide for rebuttal, and may authorize the examiner to limit the time allowed to parties testifying on an equal basis, and time limits on rebutting. Any person desiring to question other parties testifying at the hearing shall direct such questions to the examiner, who shall rule on whether or not such questions are to be answered and who shall answer them. [Code 1970 § 2.19.070.]