56.—(1) A contracting authority must as soon as possible after reaching a decision concerning the award of a contract, the conclusion of a framework agreement or admittance to a dynamic purchasing system, inform each candidate and tenderer of the decision reached.
(2) Information provided in accordance with paragraph (1) must, where applicable, include the grounds for any decision—
(a)not to conclude a framework agreement;
(b)not to award a contract for which there has been a call for competition;
(c)to recommence the procedure; or
(d)not to implement a dynamic purchasing system.
(3) On request from the candidate or tenderer concerned, the contracting authority must as soon as possible, and in any event within 15 days from receipt of a written request, inform—
(a)any unsuccessful candidate of the reasons for the rejection of its request to participate;
(b)any unsuccessful tenderer of the reasons for the rejection of its tender, including, for the cases referred to in regulation 43(13) and (14) (technical specifications), the reasons for its decision of non-equivalence or its decision that the works, supplies or services do not meet the performance or functional requirements;
(c)any tenderer that has made an admissible tender of the characteristics and relative advantages of the tender selected as well as the name of the successful tenderer or the parties to the framework agreement; and
(d)any tenderer that has made an admissible tender of the conduct and progress of negotiations and dialogue with tenderers.
(4) A contracting authority may decide to withhold certain information referred to in paragraphs (2) and (3), where the release of such information—
(a)would impede law enforcement or otherwise be contrary to the public interest;
(b)would prejudice the commercial interests of any person; or
(c)might prejudice fair competition between economic operators.