Forward any request of revision of prices to the procurement officer.

In case price revision request does not comply with the contract provision on price revision, refuse the proposed revision and request the strict application of contractual prices.

In case revision of prices complies with contract provision on price revision and provided the procurement officer agrees with the request, prepare a contract amendment (see section on amendments for further details).

Stick to the contract.

CERN does not accept price revision with retroactive effect.