(1)(a) Each comprehensive land use plan and development regulations shall be subject to continuing review and evaluation by the county or city that adopted them. Except as otherwise provided, a county or city shall take legislative action to review and, if needed, revise its comprehensive land use plan and development regulations to ensure the plan and regulations comply with the requirements of this chapter according to the deadlines in subsections (4) and (5) of this section.

(b)(i) A city or town located within (([a]))a county planning under RCW 36.70A.040 may opt out of a full review and revisions of its comprehensive plan established in this section if the city or town meets the following criteria:

(ii) The department shall review the population growth rate for a city or town participating in the partial review and revision of its comprehensive plan process at least three years before the periodic update is due as outlined in subsection (4) of this section and notify cities of their eligibility.

(iii) A city or town that opts out of a full review and revision of its comprehensive plan must update its critical areas regulations and its capital facilities element and its transportation element.

(c) Except as otherwise provided, a county or city not planning under RCW 36.70A.040 shall take action to review and, if needed, revise its policies and development regulations regarding critical areas and natural resource lands adopted according to this chapter to ensure these policies and regulations comply with the requirements of this chapter according to the deadlines in subsections (4) and (5) of this section. Legislative action means the adoption of a resolution or ordinance following notice and a public hearing indicating at a minimum, a finding that a review and evaluation has occurred and identifying the revisions made, or that a revision was not needed and the reasons therefor.

(d) The review and evaluation required by this subsection shall include, but is not limited to, consideration of critical area ordinances and, if planning under RCW 36.70A.040, an analysis of the population allocated to a city or county from the most recent 10-year population forecast by the office of financial management.

(e) Any amendment of or revision to a comprehensive land use plan shall conform to this chapter. Any amendment of or revision to development regulations shall be consistent with and implement the comprehensive plan.

(2)(a) Each county and city shall establish and broadly disseminate to the public a public participation program consistent with RCW 36.70A.035 and 36.70A.140 that identifies procedures and schedules whereby updates, proposed amendments, or revisions of the comprehensive plan are considered by the governing body of the county or city no more frequently than once every year. "Updates" means to review and revise, if needed, according to subsection (1) of this section, and the deadlines in subsections (4) and (5) of this section or in accordance with the provisions of subsection (6) of this section. Amendments may be considered more frequently than once per year under the following circumstances:

(i) The initial adoption of a subarea plan. Subarea plans adopted under this subsection (2)(a)(i) must clarify, supplement, or implement jurisdiction-wide comprehensive plan policies, and may only be adopted if the cumulative impacts of the proposed plan are addressed by appropriate environmental review under chapter 43.21C RCW;

(ii) The development of an initial subarea plan for economic development located outside of the 100 year floodplain in a county that has completed a state-funded pilot project that is based on watershed characterization and local habitat assessment;

(v) The adoption of comprehensive plan amendments necessary to enact a planned action under RCW 43.21C.440, provided that amendments are considered in accordance with the public participation program established by the county or city under this subsection (2)(a) and all persons who have requested notice of a comprehensive plan update are given notice of the amendments and an opportunity to comment.

(b) Except as otherwise provided in (a) of this subsection, all proposals shall be considered by the governing body concurrently so the cumulative effect of the various proposals can be ascertained. However, after appropriate public participation a county or city may adopt amendments or revisions to its comprehensive plan that conform with this chapter whenever an emergency exists or to resolve an appeal of a comprehensive plan filed with the growth management hearings board or with the court.

(3)(a) Each county that designates urban growth areas under RCW 36.70A.110 shall review, according to the schedules established in subsections (4) and (5) of this section, its designated urban growth area or areas, patterns of development occurring within the urban growth area or areas, and the densities permitted within both the incorporated and unincorporated portions of each urban growth area. In conjunction with this review by the county, each city located within an urban growth area shall review the densities permitted within its boundaries, and the extent to which the urban growth occurring within the county has located within each city and the unincorporated portions of the urban growth areas.

(b) The county comprehensive plan designating urban growth areas, and the densities permitted in the urban growth areas by the comprehensive plans of the county and each city located within the urban growth areas, shall be revised to accommodate the urban growth projected to occur in the county for the succeeding 20-year period. The review required by this subsection may be combined with the review and evaluation required by RCW 36.70A.215.

(c) If, during the county's review under (a) of this subsection, the county determines revision of the urban growth area is not required to accommodate the urban growth projected to occur in the county for the succeeding 20-year period, but does determine that patterns of development have created pressure in areas that exceed available, developable lands within the urban growth area, the urban growth area or areas may be revised to accommodate identified patterns of development and likely future development pressure for the succeeding 20-year period if the following requirements are met:

(v) The transportation element and capital facility plan element have identified the transportation facilities, and public facilities and services needed to serve the urban growth area and the funding to provide the transportation facilities and public facilities and services;

(4) Except as otherwise provided in subsections (6) and (8) of this section, counties and cities shall take action to review and, if needed, revise their comprehensive plans and development regulations to ensure the plan and regulations comply with the requirements of this chapter as follows:

(d) On or before June 30, 2018, for Adams, Asotin, Columbia, Ferry, Franklin, Garfield, Grant, Grays Harbor, Klickitat, Lincoln, Okanogan, Pacific, Pend Oreille, Stevens, Wahkiakum, Walla Walla, and Whitman counties and the cities within those counties.

(5) Except as otherwise provided in subsections (6) and (8) of this section, following the review of comprehensive plans and development regulations required by subsection (4) of this section, counties and cities shall take action to review and, if needed, revise their comprehensive plans and development regulations to ensure the plan and regulations comply with the requirements of this chapter as follows:

(a) Except as provided in subsection (10) of this section, on or before December 31, 2024, with the following review and, if needed, revision on or before June 30, 2034, and then every 10 years thereafter, for King, Kitsap, Pierce, and Snohomish counties and the cities within those counties;

(b) On or before ((June 30))December 31, 2025, ((and))with the following review and, if needed, revision on or before June 30, 2035, and then every 10 years thereafter, for Clallam, Clark, Island, Jefferson, Lewis, Mason, San Juan, Skagit, Thurston, and Whatcom counties and the cities within those counties;

(c) On or before June 30, 2026, and every 10 years thereafter, for Benton, Chelan, Cowlitz, Douglas, Franklin, Kittitas, Skamania, Spokane, Walla Walla, and Yakima counties and the cities within those counties; and

(d) On or before June 30, 2027, and every 10 years thereafter, for Adams, Asotin, Columbia, Ferry, Garfield, Grant, Grays Harbor, Klickitat, Lincoln, Okanogan, Pacific, Pend Oreille, Stevens, Wahkiakum, and Whitman counties and the cities within those counties.

(6)(a) Nothing in this section precludes a county or city from conducting the review and evaluation required by this section before the deadlines established in subsections (4) and (5) of this section. Counties and cities may begin this process early and may be eligible for grants from the department, subject to available funding, if they elect to do so.

(b) A county that is subject to a deadline established in subsection (5)(b) through (d) of this section and meets the following criteria may comply with the requirements of this section at any time within the 24 months following the deadline established in subsection (5) of this section: The county has a population of less than 50,000 and has had its population increase by no more than 17 percent in the 10 years preceding the deadline established in subsection (5) of this section as of that date.

(c) A city that is subject to a deadline established in subsection (5)(b) through (d) of this section and meets the following criteria may comply with the requirements of this section at any time within the 24 months following the deadline established in subsection (5) of this section: The city has a population of no more than 5,000 and has had its population increase by the greater of either no more than 100 persons or no more than 17 percent in the 10 years preceding the deadline established in subsection (5) of this section as of that date.

(7)(a) The requirements imposed on counties and cities under this section shall be considered "requirements of this chapter" under the terms of RCW 36.70A.040(1). Only those counties and cities that meet the following criteria may receive grants, loans, pledges, or financial guarantees under chapter 43.155 or 70A.135 RCW:

(b) A county or city that is fewer than 12 months out of compliance with the schedules in this section for development regulations that protect critical areas is making substantial progress towards compliance. Only those counties and cities in compliance with the schedules in this section may receive preference for grants or loans subject to the provisions of RCW 43.17.250.

(8)(a) Except as otherwise provided in (c) of this subsection, if a participating watershed is achieving benchmarks and goals for the protection of critical areas functions and values, the county is not required to update development regulations to protect critical areas as they specifically apply to agricultural activities in that watershed.

(b) A county that has made the election under RCW 36.70A.710(1) may only adopt or amend development regulations to protect critical areas as they specifically apply to agricultural activities in a participating watershed if:

(c) Beginning 10 years from the date of receipt of funding, a county that has made the election under RCW 36.70A.710(1) must review and, if necessary, revise development regulations to protect critical areas as they specifically apply to agricultural activities in a participating watershed in accordance with the review and revision requirements and timeline in subsection (5) of this section. This subsection (8)(c) does not apply to a participating watershed that has determined under RCW 36.70A.720(2)(c)(ii) that the watershed's goals and benchmarks for protection have been met.

(9)(a) Counties subject to planning deadlines established in subsection (5) of this section that are required or that choose to plan under RCW 36.70A.040 and that meet either criteria of (a)(i) or (ii) of this subsection, and cities with a population of more than 6,000 as of April 1, 2021, within those counties, must provide to the department an implementation progress report detailing the progress they have achieved in implementing their comprehensive plan five years after the review and revision of their comprehensive plan. Once a county meets the criteria in (a)(i) or (ii) of this subsection, the implementation progress report requirements remain in effect thereafter for that county and the cities therein with populations greater than 6,000 as of April 1, 2021, even if the county later no longer meets either or both criteria. A county is subject to the implementation progress report requirement if it meets either of the following criteria on or after April 1, 2021:

(iii) Progress toward implementing any actions required to achieve reductions to meet greenhouse gas and vehicle miles traveled requirements as provided for in any element of the comprehensive plan under RCW 36.70A.070.

(c) If a city or county required to provide an implementation progress report under this subsection (9) has not implemented any specifically identified regulations, zoning and land use changes, or taken other legislative or administrative action necessary to implement any changes in the most recent periodic update in their comprehensive plan by the due date for the implementation progress report, the city or county must identify the need for such action in the implementation progress report. Cities and counties must adopt a work plan to implement any necessary regulations, zoning and land use changes, or take other legislative or administrative action identified in the implementation progress report and complete all work necessary for implementation within two years of submission of the implementation progress report.

(10) Any county or city that is required by RCW 36.70A.095 to include in its comprehensive plan a climate change and resiliency element and that is also required by subsection (5)(a) of this section to review and, if necessary, revise its comprehensive plan on or before December 31, 2024, must update its transportation element and incorporate a climate change and resiliency element into its comprehensive plan as part of the first implementation progress report required by subsection (9) of this section if funds are appropriated and distributed by December 31, 2027, as required under RCW 36.70A.070(10).