(1) In its final decision and order, the board shall either:

(a) Find that the state agency, county or city is in compliance with the requirements of chapter 36.70A RCW, chapter 90.58 RCW as it relates to the adoption, denial or amendment of shoreline master programs, or chapter 43.21C RCW as it relates to adoption of plans, development regulations, and amendments thereto, under RCW 36.70A.040 or chapter 90.58 RCW; or

(b) Find that the state agency, county or city is not in compliance with the requirements of chapter 36.70A RCW, chapter 90.58 RCW as it relates to the adoption, denial or amendment of shoreline master programs, or chapter 43.21C RCW as it relates to adoption of plans, development regulations, and amendments thereto, under RCW 36.70A.040 or chapter 90.58 RCW.

(2) If the board's final decision and order finds noncompliance:

(a) Conclusions of law in the final decision and order shall specify the nature, scope, and statutory basis for the finding of noncompliance.

(b) The board's final decision and order shall remand the matter to the state agency, county, and/or city and establish a compliance schedule as specified in RCW 36.70A.300 (3)(b).

(c) The board retains jurisdiction of the matter until the board issues its final order on compliance.

(3) In its final decision and order, the board may determine that part or all of a comprehensive plan or development regulations, including shoreline master program provisions, are invalid if the board:

(a) Makes a finding of noncompliance and issues an order of remand;

(b) Includes in its final decision and order a determination, supported by findings of fact and conclusions of law, that the continued validity of part or parts of the plan or regulation would substantially interfere with the fulfillment of the goals of the act; and

(c) Specifies the part or parts, if applicable, of the plan or regulation that are determined to be invalid and the reasons for invalidity.

(4) The effect of a determination of invalidity is as set forth in RCW 36.70A.302.