As per GOI, ministry of finance office memorandum dated 14.12.1983, the tenure of posting in the north east regions is as below:
There will be a fixed tenure of posting of 3 years at a time for officers with service of 10 years or less and of 2 years at a time for officers with more than 10 years of service. Periods of leave, training, etc. in excess of 15 days per year will be excluded in counting the tenure period of 2/3 years. Officers, on completion of
the fixed tenure of service mentioned above, may be considered for posting to a station of their choice as far as possible.
The tenure of posting to Ladakh area also is given clearly in another office memorandum No. 11(6) / 2008 dated 2nd April 2013;
The Sixth Central Pay Commission had inter-alia recommended that all concessions allowed to Government employees in NER be also extended to the Government employees posted in Ladakh.
(i) Tenure of Posting/Deputation—The provisions in regard to tenure of posting/deputation contained in this Ministry’s OM No.20014/3/83-E.IV dated December 14, 1983, read with OM No.20014/16/86-E.IV/E.II(B) dated December 1, 1988,
shall continue to be applicable.
Hope the above information solves your query.