30Secondly, in the case where non-performance of a contract is relied upon to support a claimant’s action, all obligations arising under that contract must be considered to come within the concept of matters relating to a contract (see, to that effect, judgments of 6 October 1976, De Bloos, 14/76, EU:C:1976:134, paragraphs 16 and 17, and of 8 March 1988, Arcado, 9/87, EU:C:1988:127, paragraph 13).
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