§ 206. Authority to take testimony and conduct hearings. The regents, any committee thereof, the commissioner of education, the deputy and any associate and assistant commissioner of education and the counsel of the department may take testimony or hear proofs relating to their official duties, or in any matter which they may lawfully investigate. Hearings by the regents pursuant to any of the provisions of this chapter may be given by or before not less than three members of the regents designated by the regents or by the chancellor of the university to hold such hearings, but any decision or determination in such proceedings shall be made by the regents.