Insider trading disclosure formats revised; exchanges must implement amended forms and notify listed companies promptly. Revised Forms A-D standardise disclosures under the Prohibition of Insider Trading Regulations, requiring initial, appointment, continual and other connected person disclosures of securities holdings, transactions and derivatives positions. The formats specify security types, transaction modes, dates, open interest details, and a method for calculating options notional value. Stock exchanges must implement the formats immediately, amend relevant bye laws, issue guidelines, and circulate the requirements to listed companies.