(1) Every person who being a member of an All-India Service is for the time being borne on the Assam State Cadre of that Service or is otherwise serving in connection with the affairs of the State of Assam as a member of Class I service of that State may be required by the Government of that State to serve in connection with the affairs of Meghalaya for such period or periods as the Government of Assam may, by order, direct:
     Provided that no such order shall be made
         (a) before the appointed day, except with the approval of the Central Government; and
         (b) on or after the appointed day, except in accordance with such rules as may be made by the Central Government after consultation with the Governments of Assam and Meghalaya.
     (2) Subject to any general or special order which the Central Government may make in this behalf, the control over any such person as is referred to in sub-section (1) shall, for so long as he is required to serve in connection with the affairs of Meghalaya, be vested in the Government of Meghalaya.
     (3) Such persons serving in connection with the affairs of the State of Assam immediately before the appointed day, not being a person referred to in sub-section (1) as may be determined by agreement, between the Government of Assam and the Government of Meghalaya or in default of agreement, by the Central Government, may, notwithstanding anything in the terms of their appointments or their conditions of service, be required to serve in connection with the affairs of the autonomous State.
     (4) All previous service rendered by a person referred to in sub-section (3) in connection with the affairs of the State of Assam shall be deemed to have been rendered in connection with the affairs of the autonomous State for the purposes of the rules regulating his conditions of service.
     (5) Nothing in sub-sections (3) and (4) shall be deemed to affect the power of the Legislature of Meghalaya or the Governor to determine the conditions of service of persons serving in connection with the affairs of Meghalaya:
     Provided that the conditions of service applicable immediately before the appointed day to any person referred to in sub-section (3) shall not be varied to his disadvantage except with the previous approval of the Government of Assam.