What are the arrangements for invoicing?

Invoicing for the variable charges will take place monthly and will be prepared on or around the end of each month.  As we prepare these systems for first use the first invoice may be raised to cover the period Jan-Feb, but thereafter they will be monthly.  Depending on usage levels we may opt to invoice less frequently where the total value of the invoice is low.  All invoices will be sent from CGG Services (Norway) AS, VAT No. NO 979 905 483 MVA.  Full details have been supplied to each members management contact with a request that the process of supplier registration be completed.  Invoices will detail each service ordered and include any comments inserted by the user during the ordering process.  Such comments can be used to provide purchase order numbers or internal project/department cost codes.