Proportionality means that security activities must be strictly limited to those which are absolutely necessary and that security measures must be proportional to the interests to be protected as well as to the actual or potential threat to those interests, so as to enable those interests to be defended in a manner ensuring the least possible disruption.
Sorazmernost pomeni, da morajo biti varnostne dejavnosti strogo omejene na najnujnejše in da morajo biti varnostni ukrepi sorazmerni z interesi, ki jih je treba varovati, pa tudi z dejanskim ali morebitnim ogrožanjem teh interesov, z namenom omogočiti zaščito teh interesov na način, ki povzroča najmanj motenj.