Payment Schedule Except as provided in section 6.10 Travel, Meals and Lodging, payments will only be made based on Deliverables outlined within the Authorized User Agreement. Any invoice not related directly to a completed deliverable will be rejected. Any charge included on the invoice without backup documentation as specified in the Authorized User Agreement (travel receipts, etc.) may be removed. Any outstanding charges un-invoiced or removed from the invoice must be submitted/resubmitted within 120 Calendar days or may not be reimbursed. Each Deliverable may contain a retainage allotment as specified within the Authorized User Agreement. Each invoice is to include a detailed and itemized list of all retainage withholds that are in place since the activation of the Authorized User Agreement. Payment schedule shall be based on the final Authorized User Agreement as negotiated by the Authorized User and Contractor. Payment is only to be made after the deliverable within the Authorized User Agreement is accepted by the Authorized User. A Contractor is encouraged to submit no more than one invoice per month. Invoices must include cumulative retainage holdback. Invoices submitted to an Authorized User must include backup documentation as defined in the negotiated Authorized User Agreement.