II.21.7 Suspension of the time allowed for payment  II.21.8 Interest on late payment  II.22 REIMBURSEMENTS  36  II.22.3  The contracting authority reimburses travel expenses as follows:  II.22.2  The contracting authority reimburses travel and subsistence expenses on the basis of the  shortest itinerary and the minimum number of nights necessary for overnight stay at the  destination.  II.22.1  If provided for in the special conditions or in the tender specifications, the contracting  authority must reimburse expenses directly connected with the provision of the services either  when the contractor provides it with supporting documents or on the basis of flat rates.  (c) because the contracting authority has observations on the documents or deliverables submitted  with the invoice. (b) because the contractor has not produced the appropriate documents or deliverables; or (a) because it does not comply with the FWC; The contracting authority may suspend the payment periods specified in Article I.6 at any time by  notifying  the contractor (or leader in the case of a joint tender) that its invoice cannot be processed.  The reasons the contracting authority may cite for not being able to process an invoice are:  The contracting authority must  notify  the contractor (or leader in the case of joint tender) as soon as  possible of any such suspension, giving the reasons for it. In cases b) and c) referred above, the  contracting authority shall notify the contractor (or leader in case of a joint tender) the time limits to  submit additional information or corrections or a new version of the documents or deliverables if the  contracting authority requires it  Suspension takes effect on the date the contracting authority sends the  notification . The remaining  payment period resumes from the date on which the requested information or revised documents are  received or the necessary further verification, including on-the-spot checks, is carried out. Where the  suspension period exceeds two months, the contractor (or leader in the case of a joint tender) may  request the contracting authority to justify the continued suspension. Where the payment periods have been suspended following rejection of a document referred to in the  first paragraph of this Article and the new document produced is also rejected, the contracting  authority reserves the right to terminate the specific contract in accordance with Article II.18.1(c) . On expiry of the payment periods specified in Article I.6, the contractor (or leader in the case of a  joint tender) is entitled to interest on late payment at the rate applied by the European Central Bank  for its main refinancing operations in euros (the reference rate) plus eight points. The reference rate  is the rate in force, as published in the C series of the  Official Journal of the European Union,  on the  first day of the month in which the payment period ends.  Suspension of the payment period as provided for in Article II.21.7 is not considered as giving rise to  late payment. Interest on late payment covers the period running from the day following the due date for payment  up to and including the date of payment as defined in Article II.21.1.  However, when the calculated interest is EUR 200 or less, it must be paid to the contractor (or leader  in the case of a joint tender) only if it requests it within two months of receiving late payment. 