Section 47(15)(a) in The M.P. Civil Services (Pension) Rules, 1976
(a)a re-employed Government servant who had retired before 1st April, 1966 from-(i)civil service on retiring pension or superannuation pension, or(ii)military service on retiring pension, service pension or invalid pension and who on the date of re-employment, had attained the age of superannuation applicable to the post in which he is re-employed;