Section 12(1)(c) in The M.P. Civil Services (General Conditions of Services) Rules, 1961
(c)Where promotions are made on the basis of seniority subject to rejection of the unfit, the seniority of persons considered fit for promotion at the same time shall be the same as the relative seniority in the lower grade from which they are promoted. Where however a person is considered as unfit for promotion and is superseded by a junior, such person shall not, if subsequently found suitable and promoted, take seniority in the Higher grade over the junior persons who had superseded him.