(1) To aid its fact-gathering function, the Board shall have the power to conduct public hearings.

(2) The Police Department shall cooperate fully in producing police personnel to testify at such hearings regarding any specified matter under review. If such police personnel are the subject of a related criminal investigation, they may elect not to appear until the termination of such proceedings. If such police personnel are the subject of a related investigation by a specially designated Police Department Unit, they may elect not to appear until the termination of those proceedings or until the Board determines by majority vote that the related proceedings have been subjected to undue delay or are being conducted in an unacceptable manner. Except when excused from testifying pursuant to this section of the Code, all police personnel of the Department remain subject to the provisions of Section 10-110 of the Philadelphia Home Rule Charter.

(3) In order to vindicate the Board's interest in the accurate collection of truthful testimony in official proceedings, it shall have the power to record testimony by videotape, audiotape and/or stenographic transcription.

(4) All testimony given before the Board shall be given under oath.