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Annul the decision adopted by the appointing authority on 28 July 2011 rejecting the complaint made by the applicant on 3 June 2011, seeking annulment of the general implementing provisions of Articles 11 and 12 of Annex VIII to the Staff Regulations, adopted on 3 March 2011, in particular Article 9 of those general provisions, and which the appointing authority considered to be directed against the individual decision notified to the applicant on 24 May 2011, proposing a new calculation of the years of pensionable service corresponding, in the Community pension scheme, to the actuarial equivalent of the retirement pension rights acquired by the applicant under the Belgian national scheme;

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in so far as it is necessary, annul also the abovementioned decision of 24 May 2011 and, if necessary, pursuant to Article 277 of the EEC Treaty, the general implementing provisions of 3 March 2011, in particular Article 9 of those provisions;

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order the Commission to pay the costs.