As the EU legislation in the tissue and cell does not provide a basis for full harmonisation and as Directives allow the Member States a certain degree of discretion as to how to ensure their implementation, there are accordingly many differences between Member States in the approaches they have taken to implementation.
ES tiesību akti audu un šūnu jomā nenodrošina pilnīgas saskaņošanas bāzi, turklāt direktīvās dalībvalstīm ir dota zināma rīcības brīvība attiecībā uz to īstenošanu, tādēļ arī dalībvalstu pieejas attiecībā uz minēto direktīvu īstenošanu ir ļoti atšķirīgas.