Wash. Rev. Code § 79A.05.087
(1) The commission, in consultation with the department of archaeology and historic preservation, may permit commercial advertising on or in state parks lands and buildings when all the following conditions and standards are met with regard to the commercial advertising:
(2) The commission is encouraged to use its advertising authority to promote:
(3) The commission shall adopt standards for advertising, naming, product placement, and other forms of commercial recognition that require the commission to define and prohibit, at minimum, the following:
[ 2014 c 86 s 4.]