The Shoreline Management Act (SMA) requires a periodic review of comprehensively updated SMPs. Local governments must review amendments to the SMA and Ecology rules that have occurred since the master program was last amended, and determine if local amendments are needed to maintain compliance. Local governments must also review changes to the comprehensive plan and development regulations to determine if the SMP policies and regulations remain consistent with them.
Local governments should consider during their periodic review whether to incorporate any amendments needed to reflect changed circumstances, new information, or improved data. The Legislature has established a schedule for every community to complete these reviews. The first round of periodic reviews is due on or before June 30, 2019 for Snohomish, King, and Pierce counties and their cities and towns.