For purposes of the District Reorganization Act of 1965 (Division 1 (commencing with Section 56000) of Title 6), an authority, except as otherwise provided in this part, is a subsidiary district, as defined in Section 56073, to the governing body which created it. An authority has all the powers necessary to carry out the purposes of this chapter, except as limited by the governing body which created it. The governing body may use any of its powers on behalf of an authority which it created.