(1) The department of commerce shall develop and provide technical assistance and guidance to counties and cities in setting fee structures under RCW 36.70B.160(1) to ensure that the fees are reasonable and sufficient to recover true costs. The guidance must include information on how to utilize growth factors or other measures to reflect cost increases over time.

(2) When providing technical assistance under subsection (1) of this section, the department of commerce must prioritize local governments that have implemented at least three of the options in RCW 36.70B.160(1).