Appendix A Master Definition Supplement

	Specified or designated by the jurisdictional regulatory authority as it existed on December 20, 1995, or as revised by Federal or California law or Local Regulatory Authority.	
Regulatory Must-Take Generation	Those Generation resources identified by CPUC, or a Local Regulatory Authority, the operation of which is not subject to competition.  These resources will be scheduled by the relevant Scheduling Coordinator directly with the ISO on a must-take basis.  Regulatory Must-Take Generation includes qualifying facility Generating Units as defined by federal law, nuclear units and pre-existing power purchase contracts with minimum energy take requirements.	
Reliability Criteria	Pre-established criteria that are to be followed in order to maintain desired performance of the ISO Controlled Grid under contingency or steady state conditions.	
Reliability Must-Run Charge	The sum payable each month by a Responsible Utility to the ISO for the cost of Reliability Must-Run Generation.	
Reliability Must-Run Contract (RMR Contract) 	A rate schedule on file at FERC and in effect, or a contract between the ISO and a Generator, giving the ISO the right to call on the Generator to generate Energy or provide Ancillary Services from the Generating Unit as and when required to ensure the reliability of the ISO Controlled Grid, in return for certain payments.	
Reliability Must-Run Generation	Generation that the ISO determines is required to be on line to meet Applicable Reliability Criteria requirements.  This includes i) Generation constrained on line to meet NERC and WSCC reliability criteria for interconnected systems operation; ii) Generation needed to meet Load demand in constrained areas; and iii) Generation needed to be operated to provide voltage or security support of the ISO or a local area.	
Reliability Must-Run Unit	A Generating Unit which is the subject of a Reliability Must-Run Contract.	
REMnet	The Wide Area Network through which the ISO acquires meter data.	
Replacement Reserve	Generating capacity that is dedicated to the ISO, capable of starting up if not already operating, being synchronized to the ISO Controlled Grid, and ramping to a specified Load point within a sixty (60) minute period, the output of which can be continuously maintained for a two hour period.  Also, Curtailable Demand that is capable of being curtailed within sixty minutes and that can remain curtailed for two hours.	
		
Responsible Utility	The utility which is a party to the TCA in whose Service Area the Reliability Must-Run Unit is located.	
Revenue Requirement	The revenue level required by a utility to cover expenses made on an investment, while earning a specified rate of return on the investment.	
Revised Schedule	A Schedule submitted by a Scheduling Coordinator to the ISO following receipt of the ISO's Suggested Adjusted Schedule.	
RMR Owner	The provider of services under a Reliability Must-Run Contract.	
RTG (Regional Transmission Group)	A voluntary organization approved by FERC and composed of transmission owners, transmission users, and other entities, organized to efficiently coordinate the planning, expansion and use of transmission on a regional and inter-regional basis.	
SCADA (Supervisory Control and Data Acquisition)	A computer system that allows an electric system operator to remotely monitor and control elements of an electric system.	
SC Agreement	An agreement between a Scheduling Coordinator and the ISO whereby the Scheduling Coordinator agrees to comply with all ISO rules, protocols and instructions, as those rules, protocols and instructions may be amended from time to time.