The department shall prepare and maintain an official state master program register identifying original department adoption dates and the effective dates of subsequent amendments approved or adopted by the department for each local government shoreline master program. The master program register shall be available for public viewing and inspection during normal business hours at the headquarters of the department. Copies of the register shall be available from the department at the expense of the requesting party. The department shall keep the register current, incorporating master program adoption and amendment dates as they occur.