Nguồn tài chính cho các quỹ nói chung là cung cấp thông qua phân bổ ngân sách của Quốc hội nhận được trên cơ sở hàng năm và nhiều năm. Hiện nay, quá trình ngân sách của Quốc hội theo đó các lực lượng không quân hoạt động không phân biệt giữa vốn và các chi phí điều hành. | Appendix I Consolidated Financial Statements of the Air Force for the Fiscal Year Ending September 30 1988 B. Recognition of Revenue and Financing Sources Financing sources for general funds are provided through congressional appropriations which are received on both annual and multi-year bases. Currently the congressional budgetary process under which the Air Force operates does not distinguish between capital and operating expenditures. For budgetary purposes both are recognized as a use of resources outlays . For financial reporting purposes under accrual accounting operating expenses for general fund activities are recognized in the period incurred. Expenditures for capital and other long-term assets are not recognized as expenses until consumed in the Air Force s operations. Unexpended appropriations are recorded as equity of the . government. Certain expenses such as annual and military leave earned but not taken are not funded when accrued. Such expenses are financed in the period in which payment is required. Therefore for Air Force general funds an amount due from future financing sources appropriations to be provided is recognized as an asset in the consolidated statement of financial position which is comprised of the accrued amount of such expenses at year-end. The Air Force operates two types of revolving funds industrial and stock for the purpose of distributing services and inventories to Air Force and DOD activities. Revenue for industrial fund activities is recognized at the point the rendered service is completed and on a percentage of physical completion basis. Revenue for stock fund activities is recognized at the point the inventory items are sold. The Air Force performs certain services for other governmental and public entities. These services are initially financed through general funds and subsequently reimbursed by the recipients. Reimbursements are recognized as revenue at the time the services are rendered. c. Funds with . .