CISI UAE Financial Rules and Regulations stipulate that for debt securities issued via public subscription, the offeror must announce any replacement of the trustee within a maximum of 72 hours. Prompt notification ensures transparency, allowing investors to be informed about key custodial and fiduciary changes that may affect the security’s management and enforcement of rights. Delays beyond this period could impact investor confidence and violate continuous disclosure requirements, thus the 72-hour timeframe strikes a balance between operational feasibility and timely communication.