(a) All expenditures shall be made by purchase order only. Such purchase orders shall be endorsed by the director of the department authorizing the expenditure and by the Director of Finance authorizing the funds appropriated to cover the expenditure.
(b) The Director of Finance is hereby directed to approve and sign purchase orders only if the money is appropriated. Under no circumstances shall the Director of Finance approve an expenditure which will cause any account to be overdrawn above the appropriation. (Res. 48-62. Passed 10-9-62.)