Upon request by any party, the magistrate may permit the filing of an amended pleading, or amendment by interlineation, at any stage of the proceeding and upon such terms as may be just. Upon request, the magistrate may also permit the filing of supplemental pleadings asserting claims or defenses which have arisen since the date of the pleading to be supplemented. Permission to file an amended or supplemental pleading shall be freely given, and may be done with or without a hearing. Continuances to meet new matter asserted by way of amended or supplemental pleadings shall be granted if necessary to avoid surprise or other prejudice to the opposing party.
R. Civ. Proce. For. Magist. Ct. 7