The holder grants the customer a paid license of indefinite duration, non-exclusive, for the use of the goods protected by the holder, which are subject to the following conditions: c. PAYMENT PLAN. The customer receives invoices on the basis of the billing/payment plan contained in the current specifications. Invoices include a description of the services or services provided. Invoices are due and payable within [NUMBER] days of the date of the Contractor`s invoice. Interest can be collected on all amounts that have not been paid after [NUMBER] days, at the annual rate of 1-1/2 percent per month or at the highest legal rate, whichever is lower. If an invoice is not paid by the due date, the Contractor may suspend the provision of services and/or services without liability or penalty until the final solution is found. e. COUNTERPARTIES. .