Such national measures would have to be in compliance with the EU Treaty, i.e. not distort trade within the internal market, and comply with WTO obligations.
Niisugused riigisisesed meetmed peaksid olema kooskõlas ELi lepinguga, st need ei tohiks moonutada kaubandust siseturul ning peaksid olema kooskõlas WTO raames võetud kohustustega.