Service contract conditions of December 2018  Contract number: [ complete ]  (c)  travel by car: at the rate of one first class rail ticket for the same journey and on the  same day;  In addition, the contracting authority reimburses travel outside Union territory if it has given  its prior written approval for the expenses.  II.22.4  The contracting authority reimburses subsistence expenses on the basis of a daily  subsistence allowance as follows:  (a) for journeys of less than 200 km for a return trip, no subsistence allowance is payable;  (b) the daily subsistence allowance is payable only on receipt of supporting documents  proving that the person concerned was present at the destination;  (c) the daily subsistence allowance takes the form of a flat-rate payment to cover all  subsistence expenses, including meals, local transport including transport to and from  the airport or station, insurance and sundries;  (d) the daily subsistence allowance is reimbursed at the flat rates specified in Article I.4.3;  (e) accommodation is reimbursed on receipt of supporting documents proving the  necessary overnight stay at the destination, up to the flat-rate ceilings specified in  Article I.4.3. II.22.5  The contracting authority reimburses the cost of shipment of equipment or  unaccompanied luggage if it has given prior written approval for the expense.  RECOVERY  II.23. II.23.1  If an amount is to be recovered under the terms of the contract, the contractor must  repay the contracting authority the amount in question.  Recovery procedure  II.23.2. Before recovery, the contracting authority must  formally notify  the contractor of its intention  to recover the amount it claims, specifying the amount due and the reasons for recovery and  inviting the contractor to make any observations within 30 days of receipt.  If no observations have been submitted or if, despite the observations submitted, the  contracting authority decides to pursue the recovery procedure, it must confirm recovery by  formally notifying a debit note to the contractor, specifying the date of payment. The  contractor must pay in accordance with the provisions specified in the debit note.  If the contractor does not pay by the due date, the contracting authority may, after informing  the contractor in writing, recover the amounts due:  (a) by offsetting them against any amounts owed to the contractor by the Union or by the  European Atomic Energy Community or by an executive agency when it implements  the Union budget; (b) by calling in a financial guarantee if the contractor has submitted one to the  contracting authority; (c) by taking legal action. 36 