Wash. Rev. Code § 36.70A.213
(1) This chapter does not prohibit a county planning under RCW 36.70A.040 from authorizing the extension of public facilities and utilities to serve a school sited in a rural area that serves students from a rural area and an urban area so long as the following requirements are met:
[ 2017 3rd sp.s. c 32 s 1.]