; or (B) section 1308A(a) of the National Flood Insurance Act of 1968 ( 42 U.S.C. 4015a(a) ); and (3) a fee described in paragraph (1)(B)(iii) or (2) of section 1307(a) of the National Flood Insurance Act of 1968 ( 42 U.S.C. 4014(a) ). (b) Limitation on increases During the 6-year period beginning on the date of enactment of this Act, and notwithstanding section 1308(e) of the National Flood Insurance Act of 1968 ( 42 U.S.C. 4015(e) ), the Administrator may not, in any year, increase the amount of any covered cost by an amount that is more than 10 percent, as compared with the amount of the covered cost during the previous year. (c) Rule of construction Nothing in subsection (b) may be construed as prohibiting the Administrator from reducing, in any year, the amount of any covered cost, as compared with the amount of the covered cost during the previous year. (d) Average historical loss year Section 1308 of the National Flood Insurance Act of 1968 ( 42 U.S.C. 4015 ) is amended by striking subsection (h) and inserting the following: (h) Rule of construction For purposes of this section, the calculation of an average historical loss year shall be computed in accordance with generally accepted actuarial principles. . 103. Means-tested mitigation and affordability assistance Chapter I of the National Flood Insurance Act of 1968 ( 42 U.S.C. 4011 et seq.) is amended by adding at the end the following: 1326. Affordability assistance (a) Affordability assistance fund (1) Establishment The Administrator shall establish in the Treasury of the United States an Affordability Assistance Fund (referred to in this section as the Fund ), which shall be— (A) an account separate from any other accounts or funds available to the Administrator