failure of computer systems used for trading securities by companies which are members of the Stock Exchange of Thailand. If the incident results in no ability in recording an offer for trading come from

following businesses: (a) rail or pipe transportation system; (b) electricity; (c) water supply; (d) road, toll road or concession road; (e) airport; (f) deep sea port; (g) telecommunication or information

utilities (e.g., electricity, telecommunications, ventilation and air conditioning); 2. The intermediary should have measures relating to cabling security for protections of power and telecommunications line