Debenture trustees: SEBI consolidates rules on registration, due diligence, security monitoring, defaults and investor protections. SEBI's Master Circular for Debenture Trustees consolidates regulatory requirements: online registration, prior approval for change in control, and board accountability; detailed due diligence duties at appointment and security creation including independent verification, standardized due diligence certificates, and retention of records; mandatory creation, registration and trustee validation of charges before listing; use of a centralised Security and Covenant Monitoring System for asset, covenant and payment tracking with unique Asset IDs; periodic security cover certification and valuation; Recovery Expense Fund mechanics for enforcement expenses; structured investor consent and meeting procedures on default; comprehensive disclosure, reporting, grievance redress and outsourcing/conflict management obligations.