Any redevelopment agency created pursuant to prior law shall be and constitutes the redevelopment agency for the community within the meaning of chapters 31 — 33 of this title, and has all of the rights, powers, duties, and exemptions provided for a redevelopment agency under chapters 31 — 33 of this title, and, notwithstanding any other provision of those chapters, no other redevelopment agency shall be created for the community.