The framework agreement will be valid for 2 (two) calendar years after the contract is signed, with an option for an extension for up to (1) one year plus (1) one year, maximum 4 (four) calendar years. The contract can be extended by the Norwegian Defence Estates Agency with a written extension at the latest 2 (two) calendar years after the contract has been signed, then by a written extension at the latest 3 (three) calendar years after the original signing of the contract.