No plant additions including backbone plant, storage, transmission and distribution mains shall be placed in service and no additional customers may be served until such additions have been inspected by qualified water corporation personnel under the direct supervision of an engineer licensed to practice in the State of New York. Construction of plant not being done by the water corporation which will become its property, such as construction by a real estate developer, will be inspected by qualified water corporation personnel or a representative of the water corporation under the direct supervision of an engineer licensed to practice in the State of New York and the water corporation shall be reimbursed for the costs of such inspection by the developer who is building the plant.

Inspection reports, which will include job identification, materials installed by billing units (where applicable) such as linear feet of pipe, number of valves and size etc., location of plant by physical measurements in the field and description of progress and quality of work performed, shall be maintained in the files for each job inspected.