Service contract conditions of December 2018 Contract number:  II.21.5. Pre-financing, performance and money retention guarantees ............ 36$_{ }$ II.21.6. Interim payments and payment of the balance ................................... 36$_{ }$ II.21.7. Suspension of the time allowed for payment...................................... 37$_{ }$ II.21.8. Interest on late payment...................................................................... 37$_{ }$ II.22. Reimbursements .............................................................................................. 38$_{ }$ II.23. Recovery.......................................................................................................... 38$_{ }$ II.23.2. Recovery procedure  ......................................................................... 38$_{ }$ II.23.3. Interest on late payment...................................................................... 39$_{ }$ II.23.4. Recovery rules in the case of joint tender........................................... 39$_{ }$ II.24. Checks and audits ............................................................................................ 39$_{ }$ 5 