term used in this subparagraph which is also used in section 121(d)(9) shall have the same meaning as when used in such paragraph. . (b) Clerical amendment The table of sections for subpart A of part IV of subchapter A of chapter 1 of the Internal Revenue Code of 1986 is amended by inserting after the item relating to section 25D the following new item: Sec. 25E. Residential recovery zone homebuyer credit. . (c) Effective date The amendments made by this section shall apply with respect to purchases in taxable years beginning after the date that is 1 year before the date of the enactment of this Act. 3. Treatment as opportunity zones (a) In general Section 1400Z–1 of the Internal Revenue Code of 1986 is amended by adding at the end the following new subsection: (g) Certain disaster zones (1) Designation With respect to a Federally declared disaster, the chief executive officer of a State may designate under this paragraph not more than 5 percent of the applicable disaster tracts in such State with respect to such disaster. (2) No effect on limitation on number of designations An applicable disaster tract designated under paragraph (1) shall not be taken into account in determining the limitation under subsection (d). (3) Applicable disaster tract The term applicable disaster tract means, with respect to a Federally declared disaster, a population census tract in the disaster area related to such disaster. (4) Federally declared disaster