1. (1) You must have the professional or firm approve an addendum to a design plan, if they initially approved your design plan.
2. (2) If the professional or firm who approved your design plan is no longer on the department list, you may have us approve your addendum.

[Statutory Authority: Chapter 43.22 RCW. WSR 23-09-024, § 296-150P-0590, filed 4/11/23, effective 4/11/23.]