All future main sanitary sewer districts from the date of the enactment of the ordinance codified in this chapter and main sanitary sewer district No. 11 shall be subject to the provisions of this chapter. Upon the calculation of the total cost of the main sanitary sewer district improvement, the City engineer shall certify to the City clerk the total cost per square foot of said improvement and shall also certify a description of the property not included within the main sanitary sewer district improvement that could in the future use and be connected to the main sanitary sewer facilities. (Ord. 108 § 4, 1972.)