In the case where a sanitary sewer district shall include areas wherein sanitary sewers have been constructed under the authority of the County Council, or by incorporated towns, corporations or individuals, the necessary adjustments shall be made with each property owner for those costs already incurred by the property owner when those sewers were constructed. Such excess costs shall be credited to future assessments levied by the district.

Code 1935, § 1170F; 45 Del. Laws, c. 113, § 1; 47 Del. Laws, c. 178, § 1; 9 Del. C. 1953, § 2310; 55 Del. Laws, c. 85, § 15; 71 Del. Laws, c. 401, § 15