# COMAR Title 21 — State Procurement Regulations

## Subtitle 06 — Contract Formation and Award

### Chapter 09 — Invoicing, Payment, and Interest on Late Payments

#### Regulation .01 Definitions.

*COMAR 21.06.09.01*

A. In this chapter, the following terms have the meanings indicated.

B. Terms Defined.

  (1) “Late payment” means any amount that is due and payable by law under a written procurement contract, without deferral, delay, or set-off under COMAR 21.02.07.03, and remains unpaid more than 37 days after an agency receives a  proper invoice.

  (2) “Payment” includes all required processing and authorization by the Comptroller of the Treasury, as provided under COMAR 21.02.07, and may be deferred, delayed, or set-off as applicable under COMAR 21.02.07.03.

  (3) “Proper invoice” means a bill, written document, or electronic transmission, readable by the agency, provided by a vendor requesting an amount that is due and payable by law under a written procurement contract for property received or services rendered that meets the requirements of Regulation .02 of this chapter.