Some of the Directive's optional provisions and derogation clauses have contributed to the proliferation of divergent arrangements across the EU; consequently, procedural guarantees vary considerably between Member States.
Mõned direktiivi valikulised sätted ja erandid on aidanud kaasa lahknevate kordade levikule ELis, mistõttu menetluslikud tagatised on liikmesriigiti väga erinevad.