English to Spanish Tech/Engineering Electronics / Elect Eng AGreement

Billing and Payments
The Power Purchase Agreement will also describe how invoices are prepared and the time period of response to those invoices. This also includes how to handle late payments and how to deal with invoices that became final after periods of inactivity regarding challenging the invoice. The buyer also has the authority to audit those records produced by the supplier in any circumstance

Busco algo má que un "periodo de respuesta" podría ser el periodo para la cancelación de las facturas????