Definitions in prospectus rules clarify key terms like Act, Annexure, fees and Forms and defer undefined terms to statute. Rule 2 defines key terms for the Companies (Prospectus and Allotment of Securities) Rules, specifying meanings for Act, Annexure, fees, Form/e Form, Regional Director and section, and provides that terms not defined in these Rules take the meanings assigned in the Act or in the Companies (Specification of definitions details) Rules.