50.—(1) Not later than 30 days after the award of a contract or the conclusion of a framework agreement, following the decision to award or conclude it, contracting authorities shall send for publication a contract award notice on the results of the procurement procedure.
(2) Such notices shall contain the information set out in part D of Annex 5 to the Public Contracts Directive and shall be sent for publication in accordance with regulation 51.
(3) Where the call for competition for the contract concerned has been made in the form of a prior information notice and the contracting authority has decided that it will not award further contracts during the period covered by the prior information notice, the contract award notice shall contain a specific indication to that effect.
(4) In the case of framework agreements, contracting authorities shall not be bound to send a notice of the results of the procurement procedure for each contract based on such an agreement.
(5) In the case of dynamic purchasing systems, contracting authorities shall either—
(a)send a contract award notice within 30 days after the award of each contract based on a dynamic purchasing system, or
(b)group such notices on a quarterly basis, in which case they shall send the grouped notices within 30 days of the end of each quarter.
(6) Certain information on the award of the contract or the conclusion of the framework agreement may be withheld from publication where its release—
(a)would impede law enforcement or would otherwise be contrary to the public interest,
(b)would prejudice the legitimate commercial interests of a particular economic operator, whether public or private, or
(c)might prejudice fair competition between economic operators.