(except as otherwise modified under this paragraph), prorate each public housing agency's allocation otherwise established pursuant to this paragraph: Provided further , That except as provided in the following provisos, the entire amount specified under this paragraph (except as otherwise modified under this paragraph) shall be obligated to the public housing agencies based on the allocation and pro rata method described above, and the Secretary shall notify public housing agencies of their annual budget by the latter of 60 days after enactment of this Act or March 1, 2019: Provided further , That the Secretary may extend the notification period with the prior written approval of the House and Senate Committees on Appropriations: Provided further , That public housing agencies participating in the MTW demonstration shall be funded pursuant to their MTW agreements 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 2019 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 2018 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 2019 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 make temporary adjustments to the allocations