A magistrates' court proceeding under section 17A or 17B above may adjourn the proceedings at any time, and on doing so on any occasion when the accused is present may remand the accused, and shall remand him if—
(a) on the occasion on which he first appeared, or was brought, before the court to answer to the information he was in custody or, having been released on bail, surrendered to the custody of the court; or
(b) he has been remanded at any time in the course of proceedings on the information;
and where the court remands the accused, the time fixed for the resumption of proceedings shall be that at which he is required to appear or be brought before the court in pursuance of the remand or would be required to be brought before the court but for section 128(3A) below.