SBP 5.2.3	Validation Checks
The ISO’s stage one validation checks are performed automatically whenever Ancillary Services Schedules and bids are submitted, as described in the SP.  The ISO’s stage two validation is performed automatically in accordance with the timing requirements described in the SP.  A SC can also check whether its Ancillary Services Schedules and bids will pass the ISO’s stage two validation by manually initiating validation of its Ancillary Services Schedules and bids, as described in the SP, at any time prior to the deadline for submission of Ancillary Services Schedules and bids.  It is a SC’s responsibility to perform such checks.
SBP 5.3	Buy Back of Ancillary Services
A Scheduling Coordinator who has sold or self-provided Regulation, Spinning Reserve, Non-Spinning Reserve or Replacement Reserve capacity to the ISO in the Day-Ahead Market shall be required to replace such capacity to the extent scheduled self-provision is decreased between the Day-Ahead and Hour-Ahead Markets, or to the extent the Ancillary Service associated with a Generating Unit, Curtailable Demand, or System Resoruce successfully bid in a Day-Ahead Ancillary Service Market is reduced in the Hour-Ahead market, for any reason (other than the negligence or willful misconduct of the ISO, or a Scheduling Coordinator's involuntary decrease in scheduled self-provision on the instruction of the ISO).  The price for such replaced Ancillary Service shall be at the Market Clearing Price in the Hour-Ahead Market for the same Settlement Period for the Ancillary Service capacity concerned.
SBP 6	Supplemental Energy Bids
There is no requirement for SCs to submit Supplemental Energy bids.  Supplemental Energy bids submitted, however, are available to the ISO for procurement and use for Imbalance Energy, additional Voltage Support and Congestion Management in the Real Time Market.