SECRET CHARTER FOR THE SUB-COMMITTEE FOR INTELLIGENCE MOBILISATION PLANS COMPOSITION 1. The Sub-Committee will be composed of the following:Chairman DD (O&S) of appropriate Service Representatives of Grade I level of Foreign Office Admiralty War Office Air Ministry M.I.6 L.S.I.C. Security Service J.I.B. 2. The Chairman of the Sub-Committee will be provided in rotation by the Air Ministry, Admiralty and War Office, in that order, commencing with the Air Ministry on or about 1 August 48. 3. The Chairmanship will remain with one Service for approximately two years.