Ala. Code § 11-92C-21

The existence of one or more authorities incorporated under this chapter shall not prevent the subsequent incorporation under this chapter of another authority or the amendment of the certificate of incorporation of another authority pursuant to authority granted by the same county, counties, municipality or municipalities, public corporation or public corporations, or by the same combination thereof, even though the project described in the certificate of incorporation, as originally filed or amended, of any existing authority may include a project proposed by an authority that is proposed to be incorporated under this chapter or that proposes to amend its certificate of incorporation under this chapter.