conditions of Deputy Registrars are different in the aforesaid Principal Seat/Permanent Benches, so much so, whereas the pay-scale of Deputy Registrar at the Itanagar Permanent Bench is in Pay Band-3 in the scale of Rs.15,600/--39,100/- with Grade Pay of Rs.6,600/-, the counter-part at the Principal Seat is in Pay Band-4 in the scale of Rs. 12,000/--40,000/- with Grade Pay of Rs.6,400/-. As regards the age of superannuation, it is 58 years in respect of the Deputy Registrar of Itanagar Permanent Bench (presently increased to 60 years), whereas it is 60 years for a Deputy Registrar in the Principal Seat of Guwahati. Also contended is that the order of transfer have not only ruled out prospects of his promotion to the next higher post of Joint Registrar in the Principal Seat where he was the senior-most Deputy Registrar and for which his representation dated 15.01.2012 for constitution of Review DPC was pending consideration, but he also stands to be altogether ruled out from being promoted to the said next higher post at Itanagar Permanent Bench as the post of Joint Registrar is held by one Sri P.B. Dutta, who is younger in age and also junior to the petitioner in terms of length of service. It is submitted that as per extant practice, the petitioner is eligible to vie for the post of Joint Registrar only in the Itanagar Permanent Bench. In this connection, it is also submitted that from 08.12.2014 to 31.07.2018 as many as 8 (eight) Deputy Registrars, who were junior to him, had been promoted to the post of Joint Registrars at the Principal Seat. Taking it further, submission made is that the very fact that separate seniority lists are maintained is clear evidence illustrating that the post of Deputy Registrar at Itanagar Permanent Bench belongs to a different cadre vis-à-vis the post of Deputy Registrar in the Principal Seat at Guwahati. Even in respect of Leave Rules there is no meeting ground, in that, whereas the Deputy Registrar at Itanagar Permanent Bench is governed under the Central Civil Services (Leave Travel Concession) Rules, 1988, the Deputy Registrar at the Principal Seat is governed by the Leave Rules applicable to the employees of the Government of Assam. Likewise, whereas the Central Civil Services (Pension) Rules, 1978 is made applicable to Itanagar Permanent Bench, the Principal Seat follows the Assam State Services (Pension Rules), 1969. It is contended that having regard to the above, there cannot be an iota of doubt that the cadre of Deputy Registrars at the Itanagar