"This freedom is one of the cornerstones of a democratic state and is fundamental to ensuring that national minorities participate effectively in public life. It is best guaranteed in the constitution of the State. Governments sometimes seek to justify restrictions of this freedom on the grounds of national security. These restrictions should be subjected to strict scrutiny to ensure validity and the proportionality of the restriction. In particular, the effect of the restrictions on the participation of national minorities in public life should be analysed."