1. For commonly used purchases the characteristics of which, as generally available on the market, meet the requirements of the contracting authorities, contracting authorities may use a dynamic purchasing system. The dynamic purchasing system shall be operated as a completely electronic process, and shall be open throughout the period of validity of the purchasing system to any economic operator that satisfies the selection criteria. It may be divided into categories of products, works or services that are objectively defined on the basis of characteristics of the procurement to be undertaken under the category concerned. Such characteristics may include reference to the maximum allowable size of the subsequent specific contracts or to a specific geographic area in which subsequent specific contracts will be performed.

2. In order to procure under a dynamic purchasing system, contracting authorities shall follow the rules of the restricted procedure. All the candidates satisfying the selection criteria shall be admitted to the system, and the number of candidates to be admitted to the system shall not be limited in accordance with Article 65. Where contracting authorities have divided the system into categories of products, works or services in accordance with paragraph 1 of this Article, they shall specify the applicable selection criteria for each category.

Notwithstanding Article 28, the following time limits shall apply: