S.C. Code § 6-16-30
In addition to the powers granted to governing bodies, any two or more governing bodies may form a joint agency to plan, finance, develop, acquire, purchase, construct, reconstruct, improve, enlarge, own, lease, sell, operate or maintain a project situated within this State. Each governing body may severally make such plans and enter into such contracts in connection with the foregoing, not inconsistent with the provisions of this chapter, as are necessary or appropriate.
Nothing contained herein shall be construed to prevent a single governing body from undertaking studies to determine whether there is a need for a project or whether such project is feasible or undertaking the project or facilities similar to a project singly and individually.
S.C. Code § 6-16-30