37It follows that, in order to determine whether or not a matter falls within the scope of the concept of ‘civil and commercial matters’ within the meaning of Article 1(1) of Regulation No 1215/2012, and, consequently, whether it comes within the scope of that regulation, it is necessary to determine the nature of the legal relationships between the parties to the action and the subject matter of the action or, alternatively, the basis of the action and the detailed rules applicable to it (see, to that effect, judgments of 14 October 1976, LTU, 29/76, EU:C:1976:137, paragraph 4, and of 28 February 2019, Gradbeništvo Korana, C‑579/17, EU:C:2019:162, paragraph 48 and the case-law cited).
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