The Bombay Stock Exchange today issued operational guidelines for the unified Corporate Debt Market (CDM) system that will be made operational from January 2, 2007.Market regulator SEBI had earlier notified the commencement of the reporting platform for CDM.Trading in all debt instruments issued by institutions such as banks, public or private corporate bodies, municipal corporations and companies will be reported on BSE's CDM system, a BSE circular said.Mock trading would be done on CDM system from December 27 onwards between 4-6 pm, the circular said.All securities transactions valued at Rs 1 lakh or more are required to be reported to the BSE's CDM system.The present system of reporting of deals in corporate debt by BSE members will be discontinued and all such deals will now have to be reported through the unified CDM from January 2.Transactions in corporate debt are required to be reported to BSE on the day they are transacted and within 30 minutes of closing of the deal.The CDM system will be open for reporting from 10 am to 5.30 pm on all trading days of the exchange.