amounts subject to the single fund budget authority provisions of their MTW agreements, from the agencies’ calendar year 2024 MTW funding allocation: Provided further, That the Secretary shall use any offset referred to in the preceding two provisos throughout the calendar year to prevent the termination of rental assistance for families as the result of insufficient funding, as determined by the Secretary, and to avoid or reduce the proration of renewal funding allocations: Provided further, That up to $100,000,000 shall be available only— (A) for adjustments in the allocations for public housing agencies, after application for an adjustment by a public housing agency that experienced a significant increase, as determined by the Secretary, in renewal costs of vouchers resulting from unforeseen circumstances or from portability under section 8(r) of the Act