Pleadings allowed: Form of motions

There shall be a complaint and (except as provided by law) an answer, and a trustee's answer under oath if trustee process is used; a reply to a counterclaim denominated as such; an answer to a cross-claim, if the answer contains a cross-claim; a third-party complaint, if a person who was not an original party is summoned under the provisions of Rule 14; and a third-party answer, if a third-party complaint is served. No other pleading shall be allowed, except that the court may order a reply to an answer or a third-party answer. In the Land Court, answers in actions for registration, confirmation, or tax foreclosure shall conform to G.L. c. 185, § 41 , and G.L. c. 60, § 68 , where applicable.