year 2020 and each fiscal year thereafter, to remain available until expended, for incremental project-based voucher assistance or project-based rental assistance, to be allocated to States in accordance with the formula established under section 1338 of the Federal Housing Enterprises Financial Safety and Soundness Act of 1992 ( 12 U.S.C. 4568 ), to be used solely in conjunction with grant funds awarded under that section. (3) Priority for housing the homeless (A) Priority During the first 5 fiscal years for which amounts are made available under this subsection, the Secretary shall ensure that priority for occupancy in dwelling units described in subparagraph (B) that become available for occupancy is given to individuals and families who are homeless (as defined in section 103 of the McKinney-Vento Homeless Assistance Act ( 42 U.S.C. 11302 )). (B) Covered dwelling units A dwelling unit described in this subparagraph is any dwelling unit that— (i) is located in housing that has received assistance using amounts that were credited to the Housing Trust Fund under paragraph (1)