housing agencies' calendar year 2018 allocations based on the excess amounts of public housing agencies' net restricted assets accounts, including HUD held programmatic reserves (in accordance with VMS data in calendar year 2017 that is verifiable and complete), as determined by the Secretary: Provided further , That public housing agencies participating in the MTW demonstration shall also be subject to the offset, as determined by the Secretary from the agencies’ calendar year 2018 MTW funding allocation: Provided further , That the Secretary shall use any offset referred to in the previous 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: (1) 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