Definitions governing tribunal procedure set scope for parties, filings, representation and secured interests in company law proceedings. Rule 2 sets the core procedural and substantive definitions for tribunal proceedings, defining key participants (applicant, authorised representative, advocate, party), filing and registry concepts (application, petition, interlocutory application, filed, filer, Registrar, Registry), and evidentiary forms (certified and certified by Tribunal copies). It further defines creditor-related terms, specifying what constitutes a secured creditor and security interest while excluding performance guarantees, and confirms that undefined terms take their meanings from the Companies Act.