The Controller of Accounts shall receive and carefully examine all accounts, claims, bills and payrolls which have been approved and certified by the several boards, committees, commissions, commissioners, and officers authorized to make expenditures, if they are correctly cast and duly approved; or if such indebtedness arises from a written contract and such account, claim, bill or payroll conforms with the terms of such contract, the same shall be approved.
The Controller of Accounts may refuse to pay, in whole or in part, any claim on the ground that it is fraudulent, unlawful or excessive, and in that case he shall file a written statement with the Mayor stating reasons for refusal.
No account, claim, bill or payroll shall be approved by the Controller of Accounts unless at the time the indebtedness is contracted the unexpended balance of the appropriation to which it is chargeable is in excess of such account, claim, bill or payroll, together with all prior orders against such appropriation; nor shall it be approved if not properly chargeable to the appropriation to which it is sought to be charged and properly itemized.
The Controller of Accounts shall not approve or allow payment of any bill for coal in lots of one ton or more, purchased for the use of the several departments of the City, except such as have been certified to him by the Sealer of Weights and Measures, and he shall, at the time of auditing such bills, endorse on the same the number and date of certification.
All bills of each month which have been properly approved shall be in the hands of the Controller on or before the fifth of the succeeding month or more often as determined by the Controller.