Section 45(5)(vii) in Tamil Nadu Pension Rules, 1978
(vii)mother [and step mother] [Rule 45(5)(vii) the words 'and step mother' inserted - G.O.Ms.No.132, Finance (Pension) Department, dated 23-02-1995 with effect from 28th December 1983.], including adoptive parents in the case of individuals whose personal law permits adoption.