Contract number: [ complete ]  Contract conditions of December 2015  II.17. Termination of the contract................................................................................... 25$_{ }$ II.17.1. Grounds for termination by the contracting authority ................................... 25$_{ }$ II.17.2. Grounds for termination by the contractor .................................................... 25$_{ }$ II.17.3. Procedure for termination .............................................................................. 26$_{ }$ II.17.4. Effects of termination .................................................................................... 26$_{ }$ II.18. Invoices, value added tax and e-invoicing............................................................ 27$_{ }$ II.18.1. Invoices and value added tax ......................................................................... 27$_{ }$ II.18.2. E-invoicing .................................................................................................... 27$_{ }$ II.19. Price revision ........................................................................................................ 27$_{ }$ II.20. payments and guaranties....................................................................................... 28$_{ }$ II.20.1. Date of payment............................................................................................. 28$_{ }$ II.20.2. Currency ........................................................................................................ 28$_{ }$ II.20.3. Conversion ..................................................................................................... 28$_{ }$ II.20.4. Costs of transfer ............................................................................................. 28$_{ }$ II.20.5. Pre-financing, performance and money retention guarantees ....................... 28$_{ }$ II.20.6. Interim payments and payment of the balance .............................................. 29$_{ }$ II.20.7. Suspension of the time allowed for payment................................................. 29$_{ }$ II.20.8. Interest on late payment................................................................................. 30$_{ }$ II.21. Recovery ............................................................................................................... 30$_{ }$ II.22. Checks and audits ................................................................................................. 31$_{ }$ 5 