1. Life-cycle costing shall to the extent relevant cover all of the following costs over the life cycle of a product, service or works as defined in point 14 of paragraph 1 of Article 2:
(a) internal costs, including costs relating to acquisition (such as production costs), use (such as energy consumption, maintenance costs) and end of life (such as collection and recycling costs)
(b) external environmental costs directly linked to the life cycle, provided their monetary value can be determined and verified, which may include the cost of emissions of greenhouse gases and of other pollutant emissions and other climate change mitigation costs.
2. Where contracting authorities assess the costs using a life-cycle costing approach, they shall indicate in the concession award documents the methodology used for the calculation of the life-cycle costs. The methodology used must fulfil all of the following conditions:
(a) It has been drawn up on the basis of scientific information or is based on other objectively verifiable and non-discriminatory criteria;
(b) It has been established for repeated or continuous application;
(c) It is accessible to all interested parties.
Contracting authorities and contracting entities shall allow economic operators to apply a different methodology for establishing the life-cycle costs of their offer, provided that they prove that this methodology complies with the requirements set out in points a, b and c and is equivalent to the methodology indicated by the contracting authority or contracting entity.
3. Whenever a common methodology for the calculation of life-cycle costs is adopted as part of a legislative act of the Union, including by delegated acts pursuant to sector specific legislation, it shall be applied where life-cycle costing is included in the award criteria referred to in Article 39 paragraph (4).
A list of such legislative and delegated acts is set out in Annex II. The Commission shall be empowered to adopt delegated acts in accordance with Article 46 concerning the update of this list, when on the basis of the adoption of new legislation, repeal or modification of such legislation, such amendments prove necessary.