Upon approval of the petition for election by the legislative body of the code city to which such territory is proposed to be annexed, the petition shall be filed with the legislative authority of the county in which such territory is located, along with a statement, in the form required by the city, of the provisions, if any there be, relating to assumption of the portion of the debt that the city requires to be assumed by the owners of property of the area proposed to be annexed, and/or the simultaneous adoption of a proposed zoning regulation for the area. A copy of the petition and the statement, if any, shall also be filed with the boundary review board as provided for in chapter
36.93 RCW or the county annexation review board established by RCW
35A.14.160, unless such proposed annexation is within the provisions of RCW
35A.14.220.