A.   Materials Or Supplies: No member of the city council may sell, or furnish for a consideration, any materials or supplies for use of the city; and any member of the council voting for, or consenting to, or being a party to, such contract or purchase is personally liable as provided by state law.
   B.   Contracts With Council Members: The city council shall not make any contract with any of its members, or in which any of its members shall be directly or indirectly interested, such contracts being prohibited by state law.
   C.   Officers; Interest In Sale, Lease Or Contract: No officer of the city may become directly or indirectly interested individually in any sale, lease, or contract which he is authorized to make, such being prohibited by state law. (1990 Code § 7-103)