Notwithstanding anything contained in Part I or in the Code of Civil Procedure, 1908 (5 of 1908), a judicial authority, when seized of an action in a matter in respect of which the parties have made an agreement referred to in section 44, shall, at the request of one of the parties or any person claiming through or under him, refer the parties to arbitration, 2[unless it prima facie finds] that the said agreement is null and void, inoperative or incapable of being performed.