Any contractor performing a public works contract in which any state, county, or municipal funds are utilized shall be allowed reimbursement for any additional severance, sales, or use taxes incurred by the contractor as a result of an increase in the rate of severance, sales, or use taxes imposed during the time of performance of the contract. Time of performance shall be the time the contractor submits the bid until completion of the contract.
Ala. Code § 39-1-3 (1975)