1. In any region of this State for which there has been created by interstate compact a regional planning agency, the powers conferred by NRS 278.010 to 278.630, inclusive, are subordinate to the powers of such regional planning agency, and may be exercised only to the extent that their exercise does not conflict with any ordinance or plan adopted by such regional planning agency. The powers conferred by NRS 278.010 to 278.630, inclusive, shall be exercised whenever appropriate in furtherance of a plan adopted by the regional planning agency.
2. Upon the adoption by a regional planning agency created by interstate compact of any regional plan or interim plan, any plan adopted pursuant to NRS 278.010 to 278.630, inclusive, shall cease to be effective as to the territory embraced in such regional or interim plan. Each planning commission and governing body whose previously adopted plan is so affected shall, within 90 days after the effective date of the regional or interim plan, initiate any necessary procedure to revise its plan and any related zoning ordinances which affect adjacent territory.