(1) Nothing in this section or sections 40 and 41 shall be deemed to affect on or after the appointed day the operations of the provisions of Chapter I of Part XIV of the Constitution in relation to determination of the conditions of service of persons serving in connection with the affairs of the State of Himachal Pradesh:
     Provided that the conditions of service applicable immediately before the appointed day in the case of any person referred to in section 40 or section 41 shall not be varied to his disadvantage except with the previous approval of the Central Government.
     (2) All services prior to the appointed day rendered by a person allocated under section 40 or deemed to have been allocated under section 41 in connection with the administration of Union territory of Himachal Pradesh, shall be deemed to have been rendered in connection with the affairs of the State of Himachal Pradesh for the purposes of the rules regulating his conditions of service.