Section 6(3) in The Indian Administrative Service (Regulation of Seniority) Rules, 1987
(3)If an officer is transferred from one cadre to another at his request he shall be assigned a position in the gradation list of the cadre to which he is transferred below all the officers of his category borne on that cadre who have the same year of allotment: Provided that in the case of a direct recruit officer transferred from one cadre to another at his request, his seniority in the list prepared under Rule 10 of the Indian Administrative Service (Probation) Rules, 1954 shall remain unaffected for the purposes of the said list.
