(a) Estimate of Costs.—The Secretary of the Army shall include in the budget justification documents submitted to Congress in support of the President's budget for a fiscal year submitted under section 1105 of title 31 an estimate of the funds to be required in that fiscal year to cover unutilized and underutilized plant-capacity costs at Army arsenals.

(b) Use of Funds.—Funds appropriated to the Secretary of the Army for a fiscal year to cover unutilized and underutilized plant-capacity costs at Army arsenals shall be used in such fiscal year only for such costs.

(c) Treatment of Costs.—(1) The Secretary of the Army shall not include unutilized and underutilized plant-capacity costs when evaluating the bid of an Army arsenal for purposes of the arsenal's contracting to provide a good or service to a Government agency.

(2) When an Army arsenal is serving as a subcontractor to a private-sector entity with respect to a good or service to be provided to a Government agency, the cost charged by the arsenal shall not include unutilized and underutilized plant-capacity costs that are funded by a direct appropriation.

(d) Definitions.—In this section:

(1) The term "Army arsenal" means a Government-owned, Government-operated defense plant of the Department of the Army that manufactures weapons, weapon components, or both.

(2) The term "unutilized and underutilized plant-capacity costs" means the costs associated with operating and maintaining the facilities and equipment of an Army arsenal that the Secretary of the Army determines are required to be kept for mobilization needs, in those months in which the facilities and equipment are not used or are used only 20 percent or less of available work days.