S.C. Code Ann. § 6-25-30: Creation of joint systems.

(A) The governing body of an authority may join another authority to form a joint system after ascertaining by resolution that a joint system best serves the interests of the authority, its citizens, and its customers.

(B) A joint system may be formed:

(1) to plan, finance, develop, construct, acquire, improve, enlarge, sell, lease, maintain, and operate a project to service the needs of its service area;

(2) to create a finance pool; or

(3) both.

(C) A governing body of a member of a joint system may plan and enter a contract in connection with a project of the joint system consistent with the terms of this chapter.

(D) An authority may conduct a study to assess the necessity and feasibility of a project.