Company law rules introduce joint petitions, courier filing, specified forms, and detailed requirements for challenging share-rights variations. The amendment rules revise definitions and form references, require professionals to be 'in practice' in specified clauses, substitute specific Form numbers, and correct fee and Annexure errors. They add Rule 23A permitting joint petitions where claimants share a common interest, insert courier as an accepted mode of service with a definition, and permit multiple consequential reliefs from a single cause of action. Detailed Rule 68A prescribes documents and authorisations for applications to cancel variation of class share rights, advertising and service obligations, and empowers the Tribunal to cancel or confirm variations after hearing.