Judgment_paragraph 22 · BT v Laudamotion GmbH (C-111/21)

22In that respect, Article 31 of the Vienna Convention on the Law of Treaties of 23 May 1969 (United Nations Treaty Series, Vol. 1155, p. 331), which reflects customary international law and whose provisions are part of the EU legal order (see, to that effect, judgment of 27 February 2018, Western Sahara Campaign UK, C‑266/16, EU:C:2018:118, paragraph 58 and the case-law cited), states that a treaty must be interpreted in good faith in accordance with the ordinary meaning to be given to its terms in their context and in the light of its object and purpose (see, to that effect, judgment of 19 December 2019, Niki Luftfahrt, C‑532/18, EU:C:2019:1127, paragraph 31 and the case-law cited). Moreover, Article 32 of that convention provides that recourse may be had to supplementary means of interpretation, including the preparatory work of the treaty at issue and the circumstances of its conclusion.