A petition filed with the county commissioners to call an annexation election shall, subject to RCW
35.02.170, particularly describe the boundaries of the area proposed to be annexed, state the number of voters residing therein as nearly as may be, state the provisions, if any there be, relating to assumption of debt by the owners of property of the area proposed to be annexed, and/or the simultaneous adoption of a comprehensive plan for the area proposed to be annexed, and shall pray for the calling of an election to be held among the qualified voters therein upon the question of annexation.