Certain rules are unclear, unsuitable or difficult to implement or enforce, which results in differences in implementation between Member States of the common rules and creates a risk of fragmentation of the internal market.
Nekateri predpisi niso jasni, niso ustrezni ali pa jih je težko izvajati ali izvrševati, zaradi česar države članice skupne predpise izvajajo različno, to pa ustvarja tveganje razdrobljenosti notranjega trga.