Section 84 of the says that the "Central Government may give such directions to the State Governnent of Punjab and Haryana and to the Administrators of the Union Territories of Himachal Pradesh and Chandigarh as may appear to it to be necessary for the purpose of giving effect to the foregoing provisions of this part and the State Governments and the Administrator shall comply with such directions." Mr. Tarkunde relied in this connection upon the decision of this Court in Roshan Lal Tanldon vs Union of India(1) and submitted that having come into the Central Health Service on 1.11.1966 it is not open to Dr. S.P. Kapoor who came into that service subsequent to the date on which Dr. R.M. Bali joined that Service on the date of its initial constitution to contend that his seniority must be fixed 1069 with reference to the date of his appointment to the Punjab Civil Medical Service Grade I.