further , That public housing agencies participating in the MTW demonstration shall be funded pursuant to their MTW agreements and in accordance with the requirements of the MTW program and shall be subject to the same pro rata adjustments under the previous provisos: Provided further , That the Secretary may offset public housing agencies' calendar year 2020 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 2019 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, excluding amounts subject to the single fund budget authority provisions of their MTW agreements, from the agencies’ calendar year 2020 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 the Secretary may utilize unobligated balances, including recaptures and carryover, remaining from funds appropriated under this heading from prior year appropriations (excluding special purpose vouchers), notwithstanding the purposes for which such amounts were appropriated, to avoid or reduce such prorations: 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