1. Where, in accordance with Article 21(3) and (4), this Title applies, Member States shall take the necessary measures to ensure that successful tenderers which are not contracting authorities/entities apply the rules set out in Articles 51 to 53 when they award subcontracts to third parties.

2. For the purposes of paragraph 1, groups of undertakings which have been formed to obtain the contract, or undertakings related to them, shall not be considered third parties.

The tenderer shall include the exhaustive list of such undertakings in the tender. That list shall be updated following any change in the relationship between the undertakings.