Although the large majority of the responding countries (26) reported that the principle of VUD is mandatory at national level, their legislations often refer to an "encouragement" or to a "strong recommendation".
Lai arī lielais vairums atbildes sniegušo valstu (26) norādīja, ka BBZ principa ievērošana ir obligāta valsts līmenī, to tiesību aktos bieži vien ir norāde uz "mudināšanu" vai "stingru ieteikumu".