Whenever any land platted and developed is annexed to the city, all costs for the installation, including material and labor, of water mains, sanitary sewers, storm sewers and all costs for the paving of streets in such development, including the cost of paving the intersections, engineering costs, interest expenses and all other development expenses, shall be paid by the person who owns or is developing such annexed land and no part of such expense shall inure to the city; provided, that where the annexed development abuts property already within the city the proportionate share of the paving costs shall be assessed to such abutting property owners.
(1964 Code, § 20-3)