General purpose of SIS

The purpose of SIS shall be to ensure a high level of security within the area of freedom, security and justice of the Union including the maintenance of public security and public policy and the safeguarding of security in the territories of the Member States, and to ensure the application of the provisions of Chapter 4 and Chapter 5 of Title V of Part Three TFEU relating to the movement of persons on their territories, using information communicated through this system.