The aggregate amount of budget authority which may be obligated for contracts for annual contributions and for grants under section 1437
o of this title is increased by $9,912,928,000 on
October 1, 1983, and by such sums as may be approved in appropriation Acts on
October 1, 1984. The aggregate amount of budget authority that may be obligated for contracts for annual contributions for assistance under
section 1437f of this title, for contracts referred to in paragraphs (7)(A)(iv) and (7)(B)(iv), for grants for public housing, for comprehensive improvement assistance, and for amendments to existing contracts, is increased (to the extent approved in appropriation Acts) by $7,167,000,000 on
October 1, 1987, and by $7,300,945,000 on
October 1, 1988. The aggregate amount of budget authority that may be obligated for assistance referred to in paragraph (7) is increased (to the extent approved in appropriation Acts) by $16,194,000,000 on
October 1, 1990, and by $14,709,400,000 on
October 1, 1991. The aggregate amount of budget authority that may be obligated for assistance referred to in paragraph (7) is increased (to the extent approved in appropriation Acts) by $14,710,990,520 on
October 1, 1992, and by $15,328,852,122 on October 1993.