(a) A municipality that is wholly or partially in an area that is declared by the President or governor to be a disaster area may participate in and provide for housing, urban renewal, and redevelopment in the same manner as a home rule city. The exercise of these powers by a borough shall be on a nonareawide basis, except a borough may exercise the powers transferred to it by a city as provided by AS 29.35.310.
(b) Powers granted by this section must be initiated within a period of not more than five years after the date of declaration of a natural disaster by the President or governor, but these powers may be extended for an additional period of not more than three years.