3. Notwithstanding anything contained in the Chittagong Development Authority Ordinance, 1959, or in the East Bengal (Emergency) Requisition of Property Act, 1948, or in any judgment, decree or order, all orders made or purported to have been made under the said Ordinance or Act before the commencement of this Ordinance in respect of lands acquired for the Chittagong Development Authority by the Deputy Commissioner or any officer shall be deemed to have been lawfully and validly made by him as if under proper authority and no such order shall be called in question in any Court.