; (ii) was previously subject to a mortgage insured under the provisions of this title; and (iii) is owned by the Secretary pursuant to the payment of insurance benefits under this title; or (B) a mortgage that— (i) is an interest in a property that meets the requirements of clause (i) of subparagraph (A); (ii) was previously insured under this title except for mortgages insured under or made pursuant to section 235, 237, or 255; and (iii) is held by the Secretary pursuant to the payment of insurance benefits under this title. . 8. Federal share payable for Federal-aid highway projects Section 120 of title 23, United States Code, is amended by adding at the end the following: (l) Special rules regarding equitable growth areas (1) Increased Federal share for areas encouraging equitable growth (A) In general The Federal share payable on account of any project under this chapter carried out in an area governed by a jurisdiction encouraging equitable growth and not governed by any jurisdiction blocking equitable growth shall be increased, up to the total cost of the project, by the greater of— (i) 10 percent; or (ii) the percentage calculated in subparagraph (B). (B) Calculation (i) In general Except as provided in clause (ii), the percentage in subparagraph (A)(ii) shall be the percentage of the project (calculated by square mileage) that is governed by a jurisdiction encouraging equitable growth. (ii) Multiple jurisdictions For any project carried out in an area governed by multiple jurisdictions encouraging equitable growth and not governed by any jurisdiction blocking equitable growth, the percentage in subparagraph (A)(ii) shall be calculated by— (I) determining the percentage under clause (i) for each such jurisdiction