R. 4:9-4. — Supplemental Pleadings

On motion by a party the court may, upon reasonable notice and on terms, permit that party to serve a supplemental pleading setting forth transactions or occurrences which took place after the date of the pleading sought to be supplemented. A motion for leave to file a supplemental pleading shall have annexed thereto a copy of the proposed pleading. The court may require the opposing party to plead thereto, specifying in its order the time therefor.