Member States shall ensure that those national measures do not exceed the limits of what is appropriate and necessary in order to prevent the introduction, or to control the spread, of the disease in question within the Member State concerned.
Áiritheoidh na Ballstáit nach mbeidh na bearta náisiúnta sin os cionn na dteorainneacha maidir leis an rud is cuí agus is gá chun teacht isteach galair i dtrácht a chosc nó chun a leathadh a rialú laistigh den Bhallstát lena mbaineann.