Wash. Admin. Code § 197-11-164
(1) Under RCW 43.21C.440, GMA counties/cities may designate a planned action. A planned action means one or more types of project action that:
(b) In conjunction with, or to implement, a comprehensive plan or subarea plan adopted under chapter 36.70A RCW, or a fully contained community, a master planned resort, a master planned development, or a phased project, have had the significant impacts adequately addressed:
(ii) In a threshold determination or, where one is appropriate, in an environmental impact statement under the requirements of this chapter, if the planned action contains mixed use or residential development and encompasses an area that:
[Statutory Authority: RCW 43.21C.110 and 2022 c 246. WSR 23-01-119 (Order 22-08), § 197-11-164, filed 12/20/22, effective 1/20/23. Statutory Authority: RCW 43.21C.110 and 43.21C.100 [43.21C.170]. WSR 14-09-026 (Order 13-01), § 197-11-164, filed 4/9/14, effective 5/10/14. Statutory Authority: 1995 c 347 (ESHB 1724) and RCW 43.21C.110. WSR 97-21-030 (Order 95-16), § 197-11-164, filed 10/10/97, effective 11/10/97.]