; (2) by striking paragraph (2) and inserting the following: (2) Unmarried sons and unmarried daughters of lawful permanent residents Qualified immigrants who are the unmarried sons or unmarried daughters (but are not the children) of lawful permanent residents shall be allocated visas in a number not to exceed 16.8 percent of such worldwide level, plus any visas not required for the class specified in paragraph (1). ; (3) in paragraph (3), by striking 23,400 and inserting 16.8 percent of such worldwide level ; and (4) in paragraph (4), by striking 65,000 and inserting 39.9 percent of such worldwide level . (c) Conforming amendments (1) Rules for determining whether certain noncitizens are immediate relatives Section 201(f) of the Immigration and Nationality Act ( 8 U.S.C. 1151(f) ) is amended— (A) in paragraph (1), by striking paragraphs (2) and (3), and inserting paragraph (2), ; (B) by striking paragraph (2); (C) by redesignating paragraphs (3) and (4) as paragraphs (2) and (3), respectively; and (D) in paragraph (3), as redesignated by subparagraph (C), by striking through (3) and inserting and (2) . (2) Allocation of immigration visas Section 203(h) of the Immigration and Nationality Act ( 8 U.S.C. 1153(h) ) is amended— (A) in paragraph (1)— (i) in the matter preceding subparagraph (A), by striking subsections (a)(2)(A) and (d) and inserting subsection (d) ; (ii) in subparagraph (A), by striking becomes available for such noncitizen (or, in the case of subsection (d), the date on which an immigrant visa number became available for the noncitizen’s parent), and inserting became available for the noncitizen’s parent, ; and (iii) in subparagraph (B), by striking applicable ; (B) by amending paragraph (2) to read as follows: (2) Petition described The petition described in this paragraph is a petition filed under section 204 for classification of a noncitizen’s parent under subsection (a), (b), or (c).