(a) Any municipality may participate in drainage district works or projects upon mutually agreeable terms relating to such matters as the construction, financing, maintenance and operation thereof.
(b) Any municipality may contribute funds toward the construction, maintenance and operation of drainage district works or projects, to the extent that such works or projects:
(1) Provide a source of municipal water supply for the municipality, or protect an existing source of such supply, enhance its quality or increase its dependable capacity or quantity, or implement or facilitate the disposal of sewage of the municipality; or
(2) Protect against or alleviate the effects of floodwater or sediment damages affecting, or provide drainage benefits for property owned by the municipality or its inhabitants.
(c) Municipal expenditures for the aforesaid purposes are declared to be for necessary expenses. Municipalities may enter continuing contracts, some portion or all of which may be performed in an ensuing year, agreeing to make periodic payments in ensuing fiscal years to drainage districts in consideration of benefits set forth in subsection (b)(2) of this section, but no such contract may be entered into unless sufficient funds have been appropriated to meet any amount to be paid under the contract in the fiscal year in which the contract is made. The municipal governing body shall, in the budget ordinance of each ensuing fiscal year during which any such contract is in effect, appropriate sufficient funds to meet the amount to be paid under the contract in such ensuing fiscal year. The statement required by G.S. 160‑411.1 to be printed, written or typewritten on all contracts, agreements, or requisitions requiring the payment of moneys shall be placed on such a continuing contract only if sufficient funds have been appropriated to meet the amount to be paid under the contract in the fiscal year in which the contract is made.
(d) The provisions of this section are permissive. If a municipality does not participate in accordance with the provisions of this section, then the other provisions of Subchapter III shall apply and be followed. (1961, c. 614, s. 10.)