If an airport owned by a political subdivision is located wholly or partly outside of the political subdivision, the adoption of airport zoning regulations under this subtitle is subject to this section. Before any airport zoning regulation or amendment adopted under this section is effective, it shall be submitted to and approved by: The governing body of each other political subdivision in which any part of the airport is located; or If one is created under § 5-605 of this subtitle, a joint board of the political subdivisions in which any part of the airport is located. Within 60 days after a regulation is submitted to it under this section, the joint board or governing body shall either: Approve the regulation; or By written notice specifying its reasons, disapprove the regulation. If a joint board or governing body fails to disapprove a regulation as provided in paragraph (1) of this subsection, the regulation is deemed to be approved by it. The approval or disapproval of a joint board or governing body, as the case may be, is final and binding. A regulation is effective only if approved by the joint board or governing body of each political subdivision in which any part of the airport is located. If an airport zoning regulation adopted by a political subdivision under this section conflicts with any airport zoning or other regulation of any other political subdivision, the regulation adopted under this section governs.