Alabama Code Title 11. Counties and Municipal Corporations § 11-48-12

All work done or improvements made under the provisions of this article shall be done under the supervision of the city or town engineer or other superintendent appointed for that purpose by the council of such city or town;  provided, that the city or town engineer or other superintendent so appointed shall not be related by blood or by marriage to any contractor to whom work is awarded under the terms of Section 11-48-11 or, if said contractor is a corporation, to any stockholder thereof. Said city or town engineer or other superintendent so appointed shall not be interested in or have any share in the proceeds of any construction contract or any contract for the sale of materials to be employed in said work nor be a stockholder in the company selling said materials, nor shall said engineer or other superintendent so appointed be employed, directly or indirectly, by any parties having an interest in the proceeds of any such construction or sale of contract.