a dependent area) of the total number of such visas. (B) Unreserved visas With respect to the immigrant visas made available under each of paragraphs (2) and (3) of section 203(b) of such Act ( 8 U.S.C. 1153(b) ) and not reserved under paragraph (1), for each of fiscal years 2019, 2020, and 2021, not more than 85 percent shall be allotted to immigrants who are natives of any single foreign state. (3) Special rule to prevent unused visas If, with respect to fiscal year 2019, 2020, or 2021, the operation of paragraphs (1) and (2) of this subsection would prevent the total number of immigrant visas made available under paragraph (2) or (3) of section 203(b) of such Act ( 8 U.S.C. 1153(b) ) from being issued, such visas may be issued during the remainder of such fiscal year without regard to paragraphs (1) and (2) of this subsection. (4) Rules for chargeability Section 202(b) of such Act ( 8 U.S.C. 1152(b) ) shall apply in determining the foreign state to which an alien is chargeable for purposes of this subsection. (e) Effective date The amendments made by this section shall take effect as if enacted on September 30, 2018, and shall apply to fiscal years beginning with fiscal year 2019. 2103. Family-sponsored immigration priorities (a) In general Section 203(a) of the Immigration and Nationality Act ( 8 U.S.C. 1153(a) ) is amended— (1) in paragraph (1), by striking paragraph (4) and inserting paragraph (2)