The legislative authorities of counties of less than one hundred fifty thousand population may utilize this chapter by adopting a resolution stating their intent to do so. In that case or in the case of counties whose populations reach one hundred fifty thousand after March 1, 1995, this meeting shall be convened no later than sixty days after the date the county adopts its resolution of intention or was certified by the office of financial management as having a population of one hundred fifty thousand or more.
RCW 36.115.060