The Trading and Settlement Code (TSC), which sets the rules for the SEM, is governed by the SEM Committee. The TSC unit within the Regulatory Authorities' offices assists the SEM Committee in this task. For further details and a link to the TSC, please click on the following:
http://www.allislandproject.org/en/trading_and_settlement_code.aspx
For a high-level overview of how the SEM operates, please see the CER's factsheet on SEM, available here.