Payments shall be carried out monthly, unless otherwise specified. The  request for payment shall be valid if accompanied by:  Provided that the above time sheets comply with the requirements set in  clause 3.1 of Article 3 – Performance. The request for payment of the balance shall be valid if accompanied by:  Provided the above time sheet comply with the requirements set in clause  3.1 of Article 3 – Performance. For final payments, Contractor must provide a statement on the invoice that  all services related to the Specific Contract are included in the final payment  request.  [In Belgium, use of this contract constitutes a request for VAT exemption No 450,  Article 42, paragraph 3.3 of the VAT code (circular 2/1978), provided the invoice  includes the statement: ‘Exonération de la TVA, Article 42, paragraphe 3.3 du code  de la TVA (circulaire 2/1978)’ or an equivalent statement in the Dutch or German  language .]  29  [ Option: for contractors for which VAT is due in Belgium] $^{ }$5.3  Payments shall be made to the contractor’s bank account denominated in  euro as identified in Article I.7 of the FWC, on production of the invoice  showing separately the amount of the fees and the VAT applied and within  no more than 30 calendar days from the date the invoice is received by the  Unit indicated in article 5.3 below. Invoices presented by the contractor  shall indicate his place of taxation for VAT purposes and shall specify  separately the amounts not including VAT from those amounts including  VAT.   The relevant invoices, indicating the reference number of the FWC  and the specific contract to which they refer.   Statements of travel expenses in accordance with Article I.5.3 of the  FWC, where applicable;   Timesheets signed and dated by the service provider;   The relevant invoices, indicating the reference number of the FWC and  the specific contract to which they refer   Statements of travel expenses in accordance with Article I.5.3 of the  FWC, where applicable;   Timesheets signed and dated by the service provider;  $^{ }$5.2  Payment of the balance