(1) See RCW 43.21C.020, 43.21C.030(1), 43.21C.060, 43.21C.075, and 43.21C.080.

(2) Relevant environmental documents, comments, and responses shall accompany proposals through existing agency review processes, as determined by agency practice and procedure, so that agency officials use them in making decisions.

(3) When a decision maker considers a final decision on a proposal:

(a) The alternatives in the relevant environmental documents shall be considered.

(b) The range of alternative courses of action considered by decision makers shall be within the range of alternatives discussed in the relevant environmental documents. However, mitigation measures adopted need not be identical to those discussed in the environmental document.

(c) If information about alternatives is contained in another decision document which accompanies the relevant environmental documents to the decision maker, agencies are encouraged to make that information available to the public before the decision is made.