Contract maintenance entails keeping contract documentation up to date and relevant. Administrative procedures must be established to ensure proper upkeep of the contract. Maintenance must be performed by the contracting officer in an effort to ensure that any changes to the contract are fully documented in the contract file. File documentation should be sufficient for a third party to understand from the documentation what was done and why it was done. The contracting officer must identify all documentation relating to the contract and implement change control procedures to guarantee that no changes are made without proper authorization.