§18–504.

    The Commission is not liable for the payment of interest under this subtitle:

        (1)    if a proper invoice for accrued interest is not submitted within 30 days after the payment date of the amount on which the interest accrued;

        (2)    for more than 1 year and 31 days after the receipt date;

        (3)    on amounts representing unpaid interest; or

        (4)    if the Commission determines there is a dispute regarding any material factor in the contract or purchase order.