N.C. Gen. Stat. § 160A-588: Joint provision of services.

Two or more municipalities may cooperate in the exercise of any power granted by this Article according to the procedures and provisions of G.S. 160A-460 through 160A-464 of Part 1 of Article 20 of Chapter 160A of the General Statutes. Additional municipalities may join an existing transportation authority upon making satisfactory arrangements pursuant to the provisions of G.S. 160A-460 through 160A-464 of Part 1 of Article 20 of Chapter 160A of the General Statutes. (1977, c. 465; 1979, 2nd Sess., c. 1247, s. 45.)