1. 
No member of the City Commission may sell, or furnish for consideration, any materials or supplies for use of the city; and any member of the City Commission voting for, or consenting to, or being a party to such contract or purchase is personally liable as provided by Oklahoma Statutes, 1991, Title 62, Section 372.
2. 
The City Commission 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 Oklahoma Statutes, 1991, Title 62, Section 371.
3. 
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 Oklahoma Statutes, 1991, Title 62, Section 371.
All purchases of supplies, materials, equipment and contractual services for the city, and any sales thereof by the city, shall be made by the City Commission, or pursuant to authorization granted by it, and subject to its supervision and control.