Va. Code § 58.1-3245.4
Any county, city or town which adopts tax increment financing may issue obligations and may make development project cost commitments secured by the Tax Increment Financing Fund established in § 58.1-3245.2 to finance the development project costs. All obligations issued pursuant to this section shall be subject to the requirements and limitations of the Public Finance Act (Chapter 26, § 15.2-2600 et seq., of Title 15.2) and the charter provisions of each county, city or town. The ordinance authorizing the issuance of obligations may pledge all or any part of the funds deposited in the Tax Increment Financing Fund for the payment of the development project costs and any obligations to be issued to finance them. Any revenues in the Tax Increment Financing Fund which are not pledged as security for the obligations issued or allocated for development project cost commitments shall be deemed "surplus funds." At the end of the tax year, all surplus funds may be paid into the general fund of the county, city or town in which the development project area is located. The local governing body may agree, in writing, to pay all or a portion of any project development cost in annual installments from the tax increment and other available funds.
A county, city or town may also pledge any part or combination of the following revenues for a period not to exceed the term of the obligations:
Va. Code § 58.1-3245.4