; or (II) in the case of a catastrophic incident, on the date on which the catastrophic incident occurred in the area in which the census tract or nonmetropolitan county, as applicable, is located. (iii) Extension With respect to a census tract or nonmetropolitan county that is a qualified disaster area because it is located in an area in which a catastrophic incident occurred, the Administrator may extend the period described in clause (ii) if the Administrator determines that the census tract or nonmetropolitan county has not fully recovered from the catastrophic incident. (iv) Definitions In this subparagraph: (I) Major disaster area The term major disaster area means an area for which the President has declared a major disaster under section 401 of the Robert T. Stafford Disaster Relief and Emergency Assistance Act ( 42 U.S.C. 5170 ). (II) Other definitions The terms census tract and nonmetropolitan county have the meanings given such terms in subparagraph (D)(iii). ; and (3) by amending paragraph (5) to read as follows: (5) Qualified HUBZone small business concern The term qualified HUBZone small business concern means a HUBZone small business concern that has been certified by the Administrator in accordance with the procedures described in section 31. . (b) Determination of certain qualified areas The Administrator of the Small Business Administration shall make any determination as to whether or not to implement the applicable designation described in subparagraph (A) or (B) of section 3(p)(4) of the Small Business Act ( 15 U.S.C. 632(p)(4) ) immediately after the Census Bureau publicly releases the first results from the decennial census that occurs after the date of the enactment of this Act. (c) Technical amendments Section 3(p)(4)(B) of the Small Business Act ( 15 U.S.C. 632(p)(4)(B) ) is amended— (1) in clause (i), by striking section 42(d)(5)(C)(ii) of the Internal Revenue Code of 1986 and inserting section 42(d)(5)(B)(ii) of the Internal Revenue Code of 1986