Section 4. Validity of notices, awards, proceedings, etc., relating to acquisition not to be questioned and bar of suits and proceedings.

(1) The validity of any notice, inquiry, dispute, order, award or declaration and any proceeding including the proceeding for taking possession of the said lands given, held, decided, taken or made, or purporting to have been given, held, decided, taken or made, as the case may be, in connection with the acquisition of the said lands under the said Act shall not be called in question ; and (2) No Court shall have jurisdiction to entertain or try any suit or legal proceeding against the Provincial Government or against any of the Special Officers or any other officers of the Provincial Government, acting or purporting to act under the said Act in connection with the acquisition of the said lands, only on the ground that the proceedings for such acquisition were illegal or irregular by reason of the fact that any of the Special Officers was not duly appointed to perform the functions of a Collector under clause (c) of section 3, or was not duly directed to take order for the acquisition under section 7 of the said Act.