(a) Examination. In general, the technical panel shall initially examine witnesses. Following such examination, parties to the investigative hearing shall be given the opportunity to examine such witnesses. The board of inquiry shall then conclude the examination following the parties' questions.

(b) Objections.

(1) Materiality, relevancy, and competency of witness testimony, exhibits, or physical evidence shall not be the subject of objections in the legal sense by a party to the investigative hearing or any other person.

(2) Such matters shall be controlled by rulings of the chairman of the board of inquiry on his or her own motion. If the examination of a witness by a party to the investigative hearing is interrupted by a ruling of the chairman of the board of inquiry, the party shall have the opportunity to show materiality, relevancy, or competency of the testimony or evidence sought to be elicited from the witness.