; and (B) by inserting after paragraph (5) the following new paragraph: (6) Portion of State ceiling set-aside for projects designated to serve extremely low-income households (A) In general Not more than 90 percent of the portion of the State housing credit ceiling amount described in paragraph (3)(C)(ii) for any State for any calendar year shall be allocated to buildings other than buildings described in subparagraph (B). (B) Buildings described A building is described in this subparagraph if 20 percent or more of the residential units in such building are rent-restricted (determined as if the imputed income limitation applicable to such units were 30 percent of area median gross income) and are designated by the taxpayer for occupancy by households the aggregate household income of which does not exceed the greater of— (i) 30 percent of area median gross income, or (ii) 100 percent of an amount equal to the Federal poverty line (within the meaning of section 36B(d)(3)). (C) State may not override set-aside Nothing in subparagraph (F) of paragraph (3) shall be construed to permit a State not to comply with subparagraph (A) of this paragraph. (D) Termination This paragraph shall not apply to allocations after December 31, 2033. . (2) Conforming amendment Section 42(b)(4)(C) of such Code is amended by striking (h)(7) and inserting (h)(8) . (b) Increase in credit Section 42(d)(5) of such Code is amended by adding at the end the following new subparagraph: (C) Increase in credit for projects designated to serve extremely low-income households (i) In general In the case of any building— (I) which is described in subsection (h)(6)(B), and (II) which is designated by the housing credit agency as requiring the increase in credit under this subparagraph in order for such building to be financially feasible as part of a qualified low-income housing project, subparagraph (B) shall not apply to the portion of such building which is comprised of such units, and the eligible basis of such portion of the building shall be 150