Annexation of territory into the municipal; corporate limits of the City of Troy, Missouri, shall follow the requirements of Chapter 71, RSMo. The applicant for annexation, with the sole exception of the Board of Aldermen of the City, shall pay the sum of two hundred dollars ($200.00) for the application fee to the City and shall pay for all notifications, publications, mailings, and requirements set forth under Chapter 71, RSMo., prior to the incurrence of the cost by the City. All territory which may hereafter be annexed to the City of Troy shall be classified in the "R-1" Residential District until, within a reasonable time after annexation, the annexed territory shall be appropriately classified by ordinance in accordance with Section 405.065 of this Chapter.