i. First Circuit Breaker –After commencement of trading of the Colombo Stock Exchange (CSE) for the day, a Market Halt to be imposed for 30 minutes in the event the S&P SL20 index drops by 5%.
ii. Second Circuit Breaker – Having re-commenced trading after the cooling off period of 30 minutes following the S&P SL20 drop of 5%, if the S&P SL20 index drops again by another 2.5%, a Market Halt to be imposed for another 30 minutes.
iii. Third Circuit Breaker - Upon re-commencing trading subsequent to cooling off period of 30 minutes following the S&P SL20 drop of 2.5% (altogether S&P SL20 has dropped by 7.5%) if the S&P SL20 index drops by a further 2.5% (S&P SL20 index has fallen altogether by 10% for the day), trading will be halted and the market shall be closed for the day.
http://www.sec.gov.lk/wp-content/uploads/Directive7.pdf