1. Contracting entities intending to award a contract for the services referred to in Article 91 shall make known their intention by any of the following means:

(a) by means of a contract notice; or

(b) by means of a periodic indicative notice, which shall be published continuously. The periodic indicative notice shall refer specifically to the types of services that will be the subject of the contracts to be awarded. It shall indicate that the contracts will be awarded without further publication and invite interested economic operators to express their interest in writing; or

(c) by means of a notice on the existence of a qualification system, which shall be published continuously.

The first subparagraph shall, however, not apply where a negotiated procedure without prior call for competition could have been used in conformity with Article 50 for the award of a service contract.

2. Contracting entities that have awarded a contract for the services referred to in Article 91 shall make known the results by means of contract award notice. They may, however, group such notices on a quarterly basis. In that case, they shall send the grouped notices within 30 days of the end of each quarter.