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 proceedings including the proceedings 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 suits or legal
proceedings 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.