Ala. Code § 11-15-13
The proceeds derived from the sale of any warrants (other than refunding warrants) may be used only to pay the cost of acquiring, constructing, improving, enlarging and equipping a project or any part thereof as may be specified in the proceedings in which the warrants are authorized to be issued. Such cost shall be deemed to include the following: the cost of any land forming a part of the project; the cost of the labor, materials and supplies used in any such construction, improvement or enlargement, including architect's and engineer's fees and the cost of preparing contract documents and advertising for bids; the purchase price of and the cost of installing equipment for the project; the cost of landscaping the lands forming a part of the project and of constructing and installing roads, sidewalks, curbs, gutters, utilities and parking places in connection therewith; fees and expenses in connection with the authorization, sale and issuance of the warrants issued in connection with such project; and the interest on said warrants for a reasonable period prior to and during the time required for such construction and equipment. If any of the proceeds derived from the sale of said warrants remains undisbursed after completion of such work and payment of all of the said costs and expenses, such balance shall be used for retirement of warrants of the same issue.
Ala. Code § 11-15-13 (1975)