O.C.G.A. § 50-32-50 (2019)

(a) Any local government which is within the geographic area over which the authority has jurisdiction or which is within any county for which a special district has been otherwise activated pursuant to this chapter may provide, subject to the authorization of the authority as provided for in this chapter, within the territorial limits of the special district authorized by this chapter local government services consisting of land public transportation and air quality control, consistent with the terms of any authorizing resolution of the authority and, further, consistent with the regional plan or plans approved by the authority pursuant to its delegated powers if such plans are applicable to such local government’s territory. In providing such local services in such special district pursuant to the provisions of this chapter, the local government shall utilize one or more of the funding mechanisms enumerated in Article IX, Section II, Paragraph VI of the Constitution of this state for the purpose of funding, in whole or in part, only the local government services authorized by this chapter, and such services may be provided, in whole or in part, pursuant to a contract between one or more local governments within a special district activated pursuant to this chapter.

(b) Projects and facilities for the provision of local government services through special districts authorized by this chapter shall be planned by the authority consistent with approved regional plans, where applicable, and may be designed, constructed, managed, operated, and funded by the authority in whole or in part.