inhuman or degrading treatment or punishment can be strengthened by nonjudicial means of a preventive nature, based on regular visits to places of detention, Have agreed as follows: PART I General principles Article 1 The objective of the present Protocol is to establish a system of regular visits undertaken by independent international and national bodies to places where people are deprived of their liberty, in order to prevent torture and other cruel, inhuman or degrading treatment or punishment. Article 2 1. A Subcommittee on Prevention of Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment of the Committee against Torture (hereinafter referred to as the Subcommittee on Prevention) shall be established and shall carry out the functions laid down in the present Protocol. 2. The Subcommittee on Prevention shall carry out its work within the framework of the Charter of the United Nations and shall be guided by the purposes and principles thereof, as well as the norms of the United Nations concerning the treatment of people deprived of their liberty. 3. Equally, the Subcommittee on Prevention shall be guided by the principles of confidentiality, impartiality, non-selectivity, universality and objectivity. 4. The Subcommittee on Prevention and the States Parties shall cooperate in the implementation of the present Protocol. Article 3 Each State Party shall set up, designate or maintain at the domestic level one or several visiting bodies for the prevention of torture and other cruel, inhuman or degrading treatment or punishment (hereinafter referred to as the national preventive mechanism). 118