1.Without prejudice to national laws, regulations or administrative provisions concerning the remuneration of certain services, the criteria on which the contracting authorities shall base the award of public contracts shall be either:
(a)when the award is made to the tender most economically advantageous from the point of view of the contracting authority, various criteria linked to the subject-matter of the public contract in question, for example, quality, price, technical merit, aesthetic and functional characteristics, environmental characteristics, running costs, cost-effectiveness, after-sales service and technical assistance, delivery date and delivery period or period of completion, or
(b)the lowest price only.
2.Without prejudice to the provisions of the third subparagraph, in the case referred to in paragraph 1(a) the contracting authority shall specify in the contract notice or in the contract documents or, in the case of a competitive dialogue, in the descriptive document, the relative weighting which it gives to each of the criteria chosen to determine the most economically advantageous tender.
Those weightings can be expressed by providing for a range with an appropriate maximum spread.
Where, in the opinion of the contracting authority, weighting is not possible for demonstrable reasons, the contracting authority shall indicate in the contract notice or contract documents or, in the case of a competitive dialogue, in the descriptive document, the criteria in descending order of importance.