This rule respects party autonomy and is particularly appropriate in the area of contractual obligations which are created and governed by the parties to the contract (Article 3).
Selle põhimõttega austatakse poolte iseseisvust ja see on eriti asjakohane selliste lepinguliste võlasuhete puhul, mis luuakse ja mida reguleeritakse lepingu poolte poolt (artikkel 3).