Georgia Code Title 32. Highways, Bridges, and Ferries § 32-10-102

(a) The revenues, tolls, and earnings derived from any particular project or projects and all or any part of the revenues, tolls, and earnings received by the authority, regardless of whether or not such tolls, earnings, and revenues were produced by a particular project for which bonds have been issued, unless otherwise pledged or allocated, may be pledged by the authority to the payment of the principal and interest obligations of any revenue bond issues of the authority. All funds so pledged, from whatever source received, which may include funds received from one or more of all sources of the authority's income, shall be set aside at regular intervals, as may be provided in the resolutions or trust indentures, into sinking funds which shall be pledged to and charged with the payment of (1) the interest upon such revenue bonds as such interest shall fall due, (2) the principal of the bonds as the same shall mature, (3) the necessary charges of paying agents for paying principal and interest, and (4) any premium required upon bonds retired by call or purchase as may be provided in the resolutions or trust indentures.

(b) The use and disposition of such sinking funds shall be subject to such regulations as may be provided in the resolutions authorizing the issuance of the revenue bonds or in the trust indentures; but, except as may otherwise be provided in such resolutions or trust indentures, such sinking funds, individually, shall be funds for the benefit of all revenue bonds of the given issue for which they are created without distinction or priority of one over another. Subject to the resolution or trust indenture of any given bond issue, any moneys in such sinking funds, after all bonds and the interest thereon for which such sinking funds were pledged have been paid, may be paid into the authority fund provided for in Code Section 32-10-72.