Section 14(1) in The Assam Economic and Statistical (Junior) Service Rules, 1980
(1)The Appointing Authority may promote incumbents from a lower cadre to a higher cadre on the basis of seniority and suitability, against purely temporary local vacancies arising and lasting from 15 (fifteen) days to 2 (two) months. Such promotions beyond this period will have normally to be on regular basis. Any departure from this sub-rule will require Government's prior approval. Any such promotion shall automatically terminate at the expiry of a period of 2 (two) months unless specifically ordered otherwise by the Government.
