The department may refuse issuance of a permit under Section 21656 if it determines that the erection of or addition to a structure would obstruct the airspace overlying the state so as to create an unsafe condition for the flight of aircraft.

Any person denied a permit shall, upon request, be granted a hearing by the department to determine whether a permit shall be issued. The hearing shall be held pursuant to Chapter 5 (commencing with Section 11500) of Part 1 of Division 3 of Title 2 of the Government Code.