Section 49(4)(iv) in The Khadi And Village Industries Commission Employees (Pension) Regulations, 1984
(iv)before allowing the family pension for life to such son or daughter, the Commission shall satisfy that the handicap is of such a nature so as to prevent him or her from earning his or her livelihood and the same shall be evidenced by a certificate obtained from a nominated medical authority setting out the exact mental or physical condition of the child;