Asset freezing under the WMD Act: exchanges and intermediaries must block and report designated parties promptly. Stock exchanges and registered intermediaries must maintain and update a Designated List, screen clients at onboarding and periodically, and on any match immediately withhold transactions and notify the Chief Nodal Officer with full particulars of funds, financial assets or economic resources involved. They must file Suspicious Transaction Reports with FIU-IND and send copies of such communications to SEBI's Nodal Officer. The CNO will verify reported matches and, if confirmed, issue freezing directions under Section 12A to prohibit making funds or services available to designated persons, with procedures for exemptions and inadvertent freezes.