(A) No payment shall be made or obligation incurred against any allotment or appropriation except in accordance with appropriation duly made and unless the City Manager, or the City Manager’s designee first certifies that there is a sufficient unencumbered balance in such allotment or appropriation and that sufficient funds therefrom are or will be available to cover the claim or meet the obligation when it becomes due and payable.
(B) Any authorization of payment or incurring of obligation in violation of the provisions of this Charter shall be void and any payment so made shall be illegal. Such action shall be cause for removal of any elected or appointed officer who knowingly authorized or made such payment or incurred such obligation, and he or she shall also be liable to the City for any amount so paid.
(C) All purchases made and contracts executed by the City shall be in accordance with the requirements of the Constitution and laws of the State of Texas.