Buyer shall bear all applicable federal, state, municipal and other government taxes (such as sales, use and similar taxes), as well as import or customs duties, license fees and similar charges, however designated or levied on the sale of the Products (or the delivery thereof) or measured by the purchase price paid for the Products. (NCT's prices set forth on the front side of the invoice do not include such taxes, fees and charges.) Exemption certificates must be presented prior to shipment if they are to be honored. Unless otherwise specified, payment terms are COD. NCT, at its discretion, may require reasonable advance assurances of payment through irrevocable bank letters of credit or otherwise. All unpaid invoices shall bear interest at an amount equal to 1-1/2% of the outstanding balance per month (or the maximum rate of interest allowed to be contracted for by law, whichever is less), commencing upon the date payment is due. Buyer's failure to make timely payment may result in such action as commencement of proceedings for collection, revocation of credit, stoppage of shipment, delay or cessation of future deliveries, repossession of unpaid delivered goods and termination of any one or more sales agreements. Notwithstanding any "net" payment provisions specified on the invoice, NCT shall have no continuing obligation to deliver Products on credit, and any credit approval may be withdrawn by NCT at any time and without prior notice. NCT retains (and Buyer grants to NCT by submitting a purchase order) a security interest in the Products to secure payment in full and compliance with all sales agreements, and Buyer agrees to execute any additional documents necessary to perfect such security interest. In the event the sales invoice shall be placed by NCT in the hands of an attorney for the purpose of collection, with or without litigation, or for the purpose of enforcing NCT's security interest in the Products, the Buyer agrees to pay any and all costs associated with such placement, including, wi thout limitation, attorney's fees and costs incurred prior to, during, or subsequent to trial, and including, without limitation, collection, bankruptcy, or other creditor's rights proceedings. If a sale is to occur, or the Product is to be shipped, outside of the United States, Buyer acknowledges and agrees that the amount due NCT is contracted in U.S. Dollars and that payment in U.S. Dollars is of the essence. Any payment by Buyer in local currency or the receipt by NCT of local currency as a consequence of enforcement procedures against Buyer will be deemed an authorization for NCT to use that local currency to purchase U.S. Dollars or, if such purchase is prohibited by local law, an authorization to purchase appropriate bonds or other instruments and export them from the Buyer's country in order to convert the currency into U.S. Dollars and apply the proceeds to the payment of any amounts owed to NCT by Buyer. Any deficiency as a result of conversion of payment into U.S. Dollars shall be the responsibility of Buyer.