A licensee shall display the license conspicuously in the office or place of employment of the licensee. A licensee shall notify the Board in writing of: The address of each place where the licensee provides hearing aid services; and A change of address within 30 days after the change. If a licensee has more than one place of business, the licensee shall specify on each notice required under this regulation the place to which the Board should mail its notices and other correspondence to the licensee.