68In that regard, in the first place, it is sufficient to recall that, in contractual matters, the Commission must observe the principles governing contracts (see Opinion of Advocate General Kokott in Case C-294/02 Commission v AMI Semiconductor Belgium and Others [2005] ECR I-2175, I-2178, point 170). In principle, it does not have the right, in that context, to adopt unilateral measures (see, to that effect, order in Musée Grévin v Commission, cited above, paragraph 85). Consequently, the Commission is not entitled to address any measure having the nature of a decision to the contractor concerned with a view to the latter’s performance of his contractual obligations of a financial nature, but is required, where appropriate, to bring a claim for payment before the court having jurisdiction.
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