For a proper decision of this question, it is necessary to advert to sections 115(7) and 116 of the States Reorganisa tion Act, 1956, Article 311 (1 ) of the Constitution as also to contention No. 4 raised by the CorpOration in the State ment of Case filed by it before this Court and the admission made by the appellants in answer to the interrogatories served on them by the first respondent under Order 11 Rule 2 of the Code of Civil Procedure which are in these terms : "Section 115(7). "Nothing in this section shall be deemed to affect after the appoint ed day the operation of the provisions of Chapter I of Part XIV of the Constitution in relation to the determination of the condi tions of service of persons serving in connection with the affairs of the Union or any State: Provided that the conditions of service applicable immediately before the appointed day to the case of any person referred to in sub section ( 1 ) or sub sec tion ( 2 ) shall not be varied to his disad vantage except with the previous approval of the Central Government.