2.10. Modifying contracts
For modifications of grant contracts, please refer to section 6.7.
Contracts may need to be modified if the circumstances of project implementation have changed since the contract was signed. Contracts can only be modified during their execution period. Any changes to the contract must be made officially by means of an administrative order or an addendum in accordance with the General Conditions. Substantial changes to the contract must be made by means of an addendum. Such an addendum must be signed by the contracting parties (and, under a decentralised ex-ante system, approved and endorsed by the European Commission). The contractor may simply notify the Contracting Authority of changes of address, changes of bank account, and changes of auditor (in the case of service contracts); this does not affect the Contracting Authority's right to oppose the contractor's/beneficiary's choice of bank account or auditor.