Any community in which a disaster has occurred, and which prior to January 1, 1996, had not authorized a redevelopment agency to transact business or exercise any powers, may, by ordinance, declare the need for an agency to function in the community. The ordinance of the legislative body declaring that there is a need for an agency to function in the community and the ordinance adopting the redevelopment plan shall be subject to referendum as prescribed by law for the ordinances of the legislative body.