Beginning trade date Jan. 16, 2019, the following Open Access Same-Time Information System (OASIS) Transmission reports will display data at the Intertie Constraint (ITC) and Intertie Scheduling Limit (ISL) level:

• Current Transmission Usage
• Transmission Outages
• Transmission Interface Usage
• Market Available Transmission Capacity

The Transmission Interface identifiers on these reports will

(1) no longer refer to Branch Groups (BG) or TIEs;

(2) "MALIN500" will refer to as "MALIN500_ISL"

These identifiers align with the current ISO's modeling and naming convention for market scheduling.

For additional information, please refer to the mapping of intertie constraints and scheduling limits to ties and scheduling points under the Atlas Reference reports:

• Scheduling Point and Tie Definition
• Intertie Constraint and Scheduling Point Mapping
• Intertie Scheduling Limit and Tie Mapping

This change was discussed at the Technical User Group (TUG) Web Conference on Dec. 11, 2018. Supporting information presented at the TUG is available at: http://www.caiso.com/Documents/Agenda-TechnicalUserGroupWebConference-Dec11-2018.pdf