3.The Secretariat shall keep a record of all communications received and shall, where appropriate, send an acknowledgement of receipt to the authors of such communications. 4.All correspondence sent by the SPT or on behalf of the SPT shall be agreed in advance by the Bureau. The Secretariat shall provide the Bureau with copies of all such correspondence sent out with the date of transmission. 5.The Secretariat shall be responsible for informing the SPT of any issues that may be brought before it for consideration or of any other developments that may be of relevance to it. The Secretariat shall transmit to the SPT information on all correspondence and other communications addressed to it or relevant to its mandate. Rule 18Meetings with States parties The Secretariat shall be responsible for informing the SPT in advance of all meetings with States parties at which the SPT is the subject of discussion, and shall consult with the SPT in advance as to any input concerning the SPT at such meetings. The Secretariat shall also ensure that the SPT has the opportunity to be represented at such meetings in person, or by contributing to and agreeing information to be provided about the SPT. VI.Languages Rule 19Official and working languages 1.Arabic, Chinese,English, French, Russian and Spanish shall be the official languages of the SPT. Statements made in an official language shall be interpreted into the other official languages. 2. English, Spanish and French shall be the working languages of the SPT. The working languages of the SPT may be changed by its decision. All formal decisions and official documents of the SPT shall be issued in the working languages. VII.Confidentiality Rule 20In camera sessions 1.The meetings of the SPT shall be held in camera. Its deliberations shall remain confidential. 2.The SPT may hear any person whom it considers to be in a position to assist it in the performance of its functions under the Optional Protocol. Such persons shall attend a meeting by invitation of the SPT only, in consultation with the Secretariat, and shall be bound by strict confidentiality. 3. The SPT may decide on an ad hoc basis that a meeting shall be public. VIII.Documents of the SPT Rule 21Confidentiality All documentation and information of the SPT shall be kept strictly confidential, unless the SPT decides otherwise in relation to a particular document. Rule 22Summary reports 1.The Secretariat shall produce a draft summary report of each session in a working language of the SPT, including the main observations, issues addressed and decisions taken. The draft summary report shall be analytically structured in accordance with the items of the agenda, and shall be transmitted to the SPT for comments and amendments within one month of the end of the session concerned. A revised version of the summary report, incorporating the amendments suggested by the SPT, shall be circulated to the SPT at least three weeks prior to the next session, in the working languages of the SPT. Rule 23List of decisions A draft list of decisions taken by the SPT during each session shall be prepared by the Secretariat, in consultation with the Bureau, and adopted by the SPT. Rule 24Annual report In accordance with article 16, paragraph 3, of the Optional Protocol, the SPT shall prepare a public annual report on its activities. The SPT shall present its public annual report to the Committee against Torture. IX.Conduct of business Rule 25Quorum Fourteen (14) members of the SPT shall constitute a quorum.