Each notice shall state briefly the purpose of the election, setting forth the proposition to be voted upon and a description of the territory. The notice shall further state that any district upon its establishment shall have the powers, objects and purposes provided by sections 190.005^* to 190.085, and shall have the power to levy a property tax not to exceed thirty cents on the one hundred dollars valuation, or, in lieu of a property tax, to impose a sales tax in an amount not to exceed one-half of one percent on all retail sales made in such ambulance district which are subject to taxation pursuant to the provisions of sections 144.010 to 144.525.