2–A floor
(4) Special rules for spouses and children of lawful permanent resident aliens (A) 75 percent of 2nd preference set-aside for spouses and children not subject to per country limitation (i) In general Of the visa numbers made available under section 1153(a) of this title to immigrants described in section 1153(a)(2)(A) of this title in any fiscal year, 75 percent of the 2–A floor (as defined in clause (ii)) shall be issued without regard to the numerical limitation under paragraph (2). (ii) “2–A floor” defined In this paragraph, the term “2–A floor” means, for a fiscal year, 77 percent of the total number of visas made available under section 1153(a) of this title to immigrants described in section 1153(a)(2) of this title in the fiscal year. (B) Treatment of remaining 25 percent for countries subject to subsection (e) (i) In general Of the visa numbers made available under section 1153(a) of this title to immigrants described in section 1153(a)(2)(A) of this title in any fiscal year, the remaining 25 percent of the 2–A floor shall be available in the case of a state or area that is subject to subsection (e) only to the extent that the total number of visas issued in accordance with subparagraph (A) to natives of the foreign state or area is less than the subsection (e) ceiling (as defined in clause (ii)). (ii) “Subsection (e) ceiling” defined In clause (i), the term “subsection (e) ceiling” means, for a foreign state or dependent area, 77 percent of the maximum number of visas that may be made available under section 1153(a) of this title to immigrants who are natives of the state or area under section 1153(a)(2) of this title consistent with subsection (e). (C) Treatment of unmarried sons and daughters in countries subject to subsection (e) In the case of a foreign state or dependent area to which subsection (e) applies, the number of immigrant visas that may be made available to natives of the state or area under section 1153(a)(2)(B) of this title may not exceed— (i) 23 percent of the maximum number of visas that may be made available under section 1153(a) of this title to immigrants of the state or area described in section 1153(a)(2) of this title consistent with subsection (e), or (ii) the number (if any) by which the maximum number of visas that may be made available under section 1153(a) of this title to immigrants of the state or area described in section 1153(a)(2) of this title consistent with subsection (e) exceeds the number of visas issued under section 1153(a)(2)(A) of this title , whichever is greater. (D) Limiting pass down for certain countries subject to subsection (e) In the case of a foreign state or dependent area to which subsection (e) applies, if the total number of visas issued under section 1153(a)(2) of this title exceeds the maximum number of visas that may be made available to immigrants of the state or area under section 1153(a)(2) of this title consistent with subsection (e) (determined without regard to this paragraph), in applying paragraphs (3) and (4) of section 1153(a) of this title under subsection (e)(2) all visas shall be deemed to have been required for the classes specified in paragraphs (1) and (2) of such section.