No suit shall be instituted against the Board, or any member or any officer or other employee of the Board, or any person acting under the direction of the Board, or of the Chairman or of any officer or other employee of the Board, in respect of any act done or intended to be done under this Act or any rule or regulation made thereunder until the expiration of sixty days next after written notice has been delivered or left at the office of the Board or the place of abode of such Chairman, member, officer, employee, person, stating the cause of action, the name and place of abode of the intending plaintiff, and the relief which he claims, and the plaint must contain a statement that such notice has been so delivered or left.
98. Proof of consent of Board or Chairman or officer or other employee of Board.
— Whenever, under this Act or any rule or regulation made thereunder, the doing or the omission to do anything or the validity if anything depends upon the approval, sanction, consent, concurrence, declaration, opinion or satisfaction of—
(a) the Board or the Chairman; or
(b) any officer or other employee of the Board a written document signed by the Chairman, in case of item (a) and by the said officer or other employee in the case of item
(b), conveying or setting forth such approval, sanction, consent, concurrence, declaration, opinion or satisfaction, shall be sufficient evidence, of such approval, sanction, concurrence, declaration, opinion or satisfaction.