BFA = (Amount available for allocation - NO reserve - Total base and administrative allocations) * SF.
If the current year's State BFA is not within this transition range, the State formula allocation is changed to the amount of the transition range limit closest to the BFA amount. After having performed this transition adjustment for each State, the sum of the funds allocated to all States will differ from the amount of funds available for BFA. This difference, whether a positive or negative amount, is distributed to all States receiving a formula allocation by multiplying the difference by the SF. The end result is the transition formula allocation. The transition range will not exceed 40% (±20%), but when a smaller range is used it will be stated in the individual program section.
7 C.F.R. §1940.552