Wash. Rev. Code § 36.70B.180
Unless amended or terminated, a development agreement is enforceable during its term by a party to the agreement. A development agreement and the development standards in the agreement govern during the term of the agreement, or for all or that part of the build-out period specified in the agreement, and may not be subject to an amendment to a zoning ordinance or development standard or regulation or a new zoning ordinance or development standard or regulation adopted after the effective date of the agreement. A permit or approval issued by the county or city after the execution of the development agreement must be consistent with the development agreement.
RCW 36.70B.180
Findings-Intent-1995 c 347 §§ 502-506: See note following RCW 36.70B.170.