Contract conditions of December 2015  Contract number: [ complete ]  II.10.3  The contractor must ensure that the subcontract does not affect the rights of the  contracting authority under this contract, particularly those under Article II.8 and  II.24.  II.10.4  The contracting authority may request the contractor to replace a subcontractor  found to be in a situation provided for in points (d) and (e) of Article II.17.1.  II.11.1  Any amendment to the contract must be made in writing before all contractual  obligations have been fulfilled. II.11.2  Any amendment must not make changes to the contract that might alter the initial  conditions of the procurement procedure or result in unequal treatment of  tenderers.  II.9.1  The contractor must not assign any of the rights and obligations arising from the  contract, including claims for payments or factoring, without prior written  authorisation from the contracting authority. In such cases, the contractor must  provide the contracting authority with the identity of the intended assignee.  II.9.2  Any right or obligation assigned by the contractor without authorisation is not  enforceable against the contracting authority.  II.13.1  If a party is affected by  force majeure,  it must immediately  notify  the other party,  stating the nature of the circumstances, their likely duration and foreseeable  effects.  II.10.3 A party is not liable for any delay or failure to perform its obligations under the  contract if that delay or failure is a result of  force majeure . If the contractor is  unable to fulfil its contractual obligations owing to  force majeure , it has the right  to remuneration only for the supplies actually delivered and which obtain a  certificate of conformity.  II.13.3 The parties must take all necessary measures to limit any damage due to  force  majeure .  II.11. AMENDMENTS  II.12. ASSIGNMENT  II.13. FORCE MAJEURE II.14. LIQUIDATED DAMAGES  II.14.1. Delay in delivery  If the contractor fails to perform its contractual obligations within the applicable time  limits set in this contract, the contracting authority may claim liquidated damages for each  day of delay using the following formula: 0.3 x (V/d) where  22 