(1) A fire protection district may merge with another fire protection district located within a reasonable proximity, on such terms and conditions as they agree upon, in the manner provided in this title. The fire protection districts may be located in different counties. The district desiring to merge with another district, or the district from which it is proposed that a portion of the district be merged with another district, shall be called the "merging district." The district into which the merger is to be made shall be called the "merger district." The merger of any districts under chapter 52.06 RCW is subject to potential review by the boundary review board or boards of the county in which the merging district, or the portion of the merging district that is proposed to be merged with another district, is located.

(2) For the purposes of this section, "reasonable proximity" means geographical areas near enough to each other so that governance, management, and services can be delivered effectively.