Section 22(7)(vi) in All India Services (Death-Cum-Retirement Benefits) Rules, 1958
(vi)in the case of a mentally retarded son or daughter, the family pension shall be payable to a person nominated by the member of service or the pensioner, as the case may be, and in case no such nomination has been furnished to the Head of Office by such member of service or pensioner during his lifetime, to the person nominated by the spouse of such member of service or family pensioner, as the case may be, later on and the Guardianship Certificate issued under section 14 of the National Trust Act, 1999 (No.44 of 1999), by a local level Committee, shall also be accepted for nomination or appointment of guardian for grant of family pension in respect of persons suffering from Autism, Cerebral Palsy, Mental Retardation and Multiple Disabilities as indicated in the said Act: