The Board, in lieu of conducting a hearing upon complaint, may appoint a hearing officer for the purpose of conducting hearings and reporting the finds thereof to the Board. In conducting such hearings, the hearing officer shall be delegated all powers conferred upon the Board pursuant to this chapter as to subpoenaing witnesses, compelling their attendance, administering oaths, taking sworn testimony, and requiring the production for examination of any documents relating to any matter under investigation or question before the Board. Notice of hearing and the procedures therefor shall be in accordance with Section 173.12 of this chapter. After the conclusion of any hearing, the hearing officer shall report these finds to the Board within seven (7) days. Within fifteen (15) days after receipt of the finds of the hearing officer, the Board shall render its decision in accordance with Section 173.13 of this chapter.