In addition to rates and rentals, a separate charge in the nature of a connection fee or tapping fee for each connection of any property with the water supply system may be imposed upon the owner or occupant of the property so connected. The connection charges shall be uniform within each class of users and the amount thereof shall not exceed the actual cost of the physical connection plus an amount computed in the following manner to represent a fair payment towards the cost of the system:
The connection fee shall be recomputed at the end of each budget year, after a public hearing is held. The revised connection fee may be imposed upon those who subsequently connect in that budget year to the system.
The combination of the connection fee or tapping fee and the aforesaid water service charges shall be such that the revenues of water supply facilities shall be adequate to pay the expenses of operation and maintenance of the water supply facilities, including improvements, extensions, enlargements and replacements to water supply facilities, reserves, insurance, principal and interest on any bonds, and to maintain such reserves or sinking funds therefor as may be required under the bond covenants or any contracts, or as may be deemed necessary or desirable.
N.J.S. § 40A:31-11