; and (B) for making grants for the activities described in any of subparagraphs (B) through (D) of subsection (c)(1), reserve— (i) $276,000,000 of the funds appropriated for fiscal year 2018; (ii) $648,000,000 of the funds appropriated for fiscal year 2019; and (iii) $1,019,000,000 of the funds appropriated for fiscal year 2020. (2) Migrant or seasonal head start programs From the amount appropriated to carry out this section for a fiscal year and reserved under paragraph (1)(B), the Secretary shall reserve 4.5 percent for migrant or seasonal Head Start programs. (e) Authorization of appropriations There are authorized to be appropriated to carry out this section— (1) $3,876,000,000 for fiscal year 2018; (2) $648,000,000 for fiscal year 2019; and (3) $1,019,000,000 for fiscal year 2020. (f) Definitions In this section: (1) Full school day; full school year The terms full school day and full school year mean such a day and year, respectively, within the meaning of the Head Start Program Performance standards issued under section 641A(a) of the Head Start Act ( 42 U.S.C. 9836a(a) ). (2) Migrant and seasonal Head Start agency The term migrant and seasonal Head Start agency means an agency that is funded under this subchapter to provide a migrant and seasonal Head Start program. . (b) Conforming Amendments Section 640 of the Head Start Act ( 42 U.S.C. 9835 ) is amended— (1) in subsection (a)(6), by striking appropriated under this subchapter each place it appears and inserting appropriated under section 639 ; and (2) in subsection (g)(3)(A)— (A) by striking amount appropriated each place it appears and inserting amount appropriated under section 639 ; (B) by striking services provided under this subchapter and inserting services provided under this subchapter (other than section 657C)