1. The Subcommittee on Prevention shall establish, at first by lot, a pro- gramme of regular visits to the States Parties in order to fulfil its mandate as established in article 11. 2. After consultations, the Subcommittee on Prevention shall notify the States Parties of its programme in order that they may, without delay, make the necessary practical arrangements for the visits to be conducted. 3. The visits shall be conducted by at least two members of the Subcommit- tee on Prevention. These members may be accompanied, if needed, by experts of demonstrated professional experience and knowledge in the fields covered by the present Protocol who shall be selected from a roster of experts prepared on the basis of proposals made by the States Parties, the Office of the United Nations High Commissioner for Human Rights and the United Nations Centre for International Crime Prevention. In preparing the roster, the States Parties concerned shall propose no more than five national experts. The State Party concerned may oppose the inclusion of a specific expert in the visit, whereupon the Subcommittee on Prevention shall propose another expert. 4. If the Subcommittee on Prevention considers it appropriate, it may pro- pose a short follow- up visit after a regular visit. Article 14 1. In order to enable the Subcommittee on Prevention to fulfil its mandate, the States Parties to the present Protocol undertake to grant it: 97 a) Unrestricted access to all information concerning the number of persons deprived of their liberty in places of detention as defined in article 4, as well as the number of places and their location; b) Unrestricted access to all information referring to the treatment of those persons as well as their conditions of detention; c) Subject to paragraph 2 below, unrestricted access to all places of detention and their installations and facilities; d) The opportunity to have private interviews with the persons deprived of their liberty without witnesses, either personally or with a translator if deemed necessary, as well as with any other person who the Subcommittee 104