For any proceeding held pursuant to a provision of this chapter, except a hearing to impose a fine or revoke, suspend or deny the renewal of a license or permit, the Administrator may appoint a hearing officer from the staff of the Department of Business and Industry who shall act as his or her agent and conduct any hearing or investigation which may be conducted by the Administrator pursuant to this chapter. The Administrator shall appoint a hearing officer to conduct a hearing to impose a fine or revoke, suspend or deny the renewal of a license or permit.