(b)	the ISO will dispatch Regulation in merit order of Energy bid prices as determined by the EMS;
(c)	in the event of an unscheduled increase in system Demand or a shortfall in Generation output and Regulation margin drops below a predetermined value, the ISO will use scheduled Operating Reserve, Replacement Reserve or Supplemental Energy to restore Regulation margin; and
(d)	when scheduled Operating Reserve is used for restoration of Regulation reserve, the ISO shall arrange for the replacement of that Operating Reserve (see DP 8.7.4);
DP 8.7.2	Operating Reserve
(a)	Spinning Reserve:
(i) 	Spinning Reserve provided from Generating Units and Interconnection schedules must meet the standards specified in the ASRP;
(ii)	the ISO will dispatch Spinning Reserve as may be required to meet the Applicable Reliability Criteria;
(iii)	the ISO may dispatch Spinning Reserve as balancing Energy to return Regulation Generating Units to their Set Points and restore full Regulation margin; and
(iv)	the ISO will dispatch Spinning Reserve in merit order of Energy bid prices as determined by BEEP;
(b)	Non-Spinning Reserve:
(i)	Non-Spinning Reserve provided from Generating Units, Demands, and external imports of System Resources must meet the standards specified in the ASRP;
(ii)	the ISO may dispatch Non-Spinning Reserve in place of Spinning Reserve to meet Applicable Reliability Criteria;
(iii)	the ISO will dispatch Non-Spinning Reserve in merit order of Energy bid prices as determined by BEEP; and
(iv)	the ISO may dispatch Non-Spinning Reserve to replace Spinning Reserve if there is a shortfall in Spinning Reserve because of a deficiency of balancing Energy;

(c)	order a change in operating status of voltage control equipment; 
(d)	take required action to prevent against uncontrolled losses of load or Generation;
(e)	control the output of Generating Units and Interconnection schedules scheduled to provide Ancillary Services or offering Supplemental Energy;
(f)	dispatch Curtailable Demand which has been scheduled to provide Non-Spinning Reserve or Replacement Reserve; and
(g)	require the operation of resources which are at the ISO’s disposal in a System Emergency, as described in DP 10.
DP 9.1.2	Exercise of the ISO’s Authority
The ISO will exercise its authority under DP 9.1.1 by issuing Dispatch Instructions to the relevant Participants using the relevant communications method described in DP 4.
DP 9.2		Participant Responsibilities
DP 9.2.1	Compliance with Dispatch Instructions
All Participants within the ISO Control Area shall comply fully and promptly with the ISO’s Dispatch Instructions unless such operation would impair public health or safety.  Shedding Load for a System Emergency does not constitute impairment to public health or safety.
DP 9.2.2	Notification of Non-Compliance with a Dispatch Instruction
In the event that, in carrying out the Dispatch Instruction, an unforeseen problem arises (relating to plant operations or equipment, personnel or the public safety), the recipient of the Dispatch Instruction must notify the ISO or, in the case of a Generator, the relevant SC immediately.  The relevant SC shall notify the ISO of the problem immediately.
DP 9.3		Dispatch Instructions for Generating Units and Curtailable Demand
The ISO may issue Dispatch Instructions covering:
(a)	Ancillary Services;
(b)	Supplemental Energy, which may be used for: