Exempts, until January 1, 2029, business and occupation taxes on amounts received by a person in the form of credits against power contracts with or funds provided by the Bonneville power administration, for the purpose of implementing energy conservation programs or demand-side management programs, as long as the amount that would otherwise be owed is used for purposes of low-income ratepayer assistance or weatherization.

Requires utilities to give priority to uses of funds that permanently lower energy costs for low-income ratepayers.