Section 420

If any Court before which a confession or other statement of an accused person recorded under *section 115 or 256 is tendered or has been received in evidence finds that any of the provisions of that section has not been complied with by the Magistrate recording the statement, it shall take evidence that such person duly made the statement recorded and if it is satisfied of the same that statement shall be admitted if the error has not injured the accused as to his defence on the merits.