28. No requisition for payment may be made unless the person making the requisition certifies that there is legislative authority for making the payment and that(1) the amount claimed is a lawful charge against an appropriation;
(2) the amount claimed is due for the discharge of an obligation that has been validly assumed or in return for the performance of an obligation that has been performed in accordance with the conditions attached to it; and
(3) the requisition for payment and the applicable terms and conditions are consistent with the rules established by the Conseil du trésor.