EXHIBIT 99.323
CHANGED TO THE PX TARIFF AND PROTOCOLS NECESSARY TO ACCOMMODATE PX PARTICIPANTS'
REVISED ANCILLARY SERVICES BIDS
REQUIRED CHANGES
1. REQUIRED CHANGES TO THE TARIFF AND PROTOCOLS TO PROVIDE FOR REVISED
ANCILLARY SERVICES THROUGH THE PX
TARIFF
The present Tariff is not specific on whether or not revised ancillary services
bids are allowed. In paragraph 3.3.9 of the PX Tariff, it is stated that "The PX
shall, where possible, forward to the ISO any Ancillary Services bids submitted
to it by PX Participants in connection with any auction for Ancillary Services
conducted by the ISO." This statement will accommodate revised Ancillary
Services bids.
Therefore, there is no need to change the Tariff for accepting revised Ancillary
Services bids.
PBEP
Section 6.2.2, Format and Contents of Ancillary Services Bids, needs to be
changed to require a Bid Type flag, indicating whether an Ancillary Services bid
is "preliminary" or "revised". Note that the present TA system software and user
interface does not provide for accepting this flag yet. As a result of the
change here, the required data items for Ancillary Service bids under Section
6.2.2 need to be renumbered.
PSCP
The description of the Day-Ahead scheduling process timeline needs to be
changed. Specifically:
o A new section, renumbered as 2.1.13, needs to be added to require PX
Participants who submit revised Ancillary Services bids to do so by
11:40 am.
o The original section 2.1.13 needs to be revised to state that the PX
will forward PX Participants' revised Ancillary Services bids, if any,
and any remaining unrevised Ancillary Services bids to the ISO.
o As a result of these changes, the original sections 2.1.13, 2.1.14 and
2.1.15 will be renumbered.
The proposed tariff and protocol revisions are in the following pages.
2. POTENTIAL OF GAMING BY REVISING ANCILLARY SERVICE BIDS
No significant issue has been identified in this regard. Therefore, no changes
are proposed to address such potential. We will rely on the general provision of
the PX Tariff which would allow changes to the PX Tariff and Protocols on
revised Ancillary Services bids should unforeseen gaming surface in the future
because of the allowance of revised Ancillary Services bids.
3. PROCESS CHANGES
In the PX Day-Ahead scheduling process, the PX Participants who are to submit
revised Ancillary Services bids through PX need to submit the bids by 11:40 am.
The PX need to study if other information from the ISO (e.g., the Suggested
Adjusted Schedule and the preliminary schedule of Ancillary Services) would need
to be published to aid PX Participants' decision on revising Ancillary Service
bids. At present, there is no software capability to enable automatic publishing
such information through the TA System.
PROPOSED REVISIONS
TARIFF
[No change is necessary)
PBEP
6.2.2 FORMAT AND CONTENT OF ANCILLARY SERVICES BIDS
An Ancillary Services bid shall include the following information as
appropriate for the type of Ancillary Service, for each Settlement
Period of the Trading Day:
a) Bid Type: preliminary (e.g, PRE_ANC) or Revised
(e.g., REV_ANC)
b) PX Participant name and ID code;
c) Ancillary Service type:
i) Regulation;
ii) Spinning Reserve;
iii) Non-Spinning Reserve; or
iv) Replacement Reserve;
d) Resource ID;
e) Settlement Period for which the bid applies;
f) Trading Day for which the bid applies;
g) the $/MWh values for the Energy supplied (which shall
be the same for each of the four Ancillary Service
types);
h) the lower and upper operating limits for each
resource;
i) ramp rate;
j) capacity reservation prices (in $/MW), which may be
different for each type of Ancillary Service;
k) Regulation range both up and down;
l) Spinning Reserve, Non-Spinning Reserve or Replacement
Reserve quantity in MW;
m) the time period required to reach synchronization
(this must be the same value for all 24 Settlement
Periods for a particular resource).
PSCP
2.1.12 BY 11:00 AM, ONE DAY AHEAD
By 11:00 am on the day ahead of the Trading Day and for each
Settlement Period of that Trading Day the ISO will, acting in
accordance with the SP:
a) complete the Inter-Zonal Congestion Management
process (if Inter-Zonal Congestion does not exist in
any Settlement Period the timeline will continue with
the step at PSCP 2.1.14);
b) provide, via WEnet, a Suggested Adjusted Day-Ahead
Schedule for Energy to the PX (if it submitted a
Preferred Day-Ahead Schedule and the ISO proposes to
modify the PX's Preferred Day-Ahead Schedule);
c) publish on WEnet the estimated Day-Ahead Usage Charge
rates (in $/MW of scheduled flow) for Energy
transfers between Zones; and
d) provide, via WEnet, together with the Suggested
Adjusted Day-Ahead Schedule, a preliminary schedule
for Ancillary Services to the PX (to the extent that
the PX submitted Ancillary Services bids).
2.1.13 BY 11:40 AM, ONE DAY AHEAD
By 11:40 am on the day ahead of the Trading Day and for each
Settlement Period of that Trading Day, any PX Participant that
uses the PX as its Scheduling Coordinator must submit to PX,
through the TA System, any revised Ancillary Services Bids, in
accordance with the PBEP 6.2.2.
2.1.14 BY 12:00 NOON, ONE DAY AHEAD
By 12:00 noon on the day ahead of the Trading Day and for each
Settlement Period of that Trading Day, (except where Inter-Zonal
Congestion does not exist, in which case the timeline will continue
with the step at PSCP 2.1.15):
a) the PX will submit to the ISO, through the WEnet,
i) its unchanged Preferred Schedule as its
Revised Day-Ahead Schedule (as described in
PSCP 6.3), in response to the ISO's
Suggested Adjusted Day-Ahead Schedule;
ii) The revised Ancillary Services bids referred
to in PSCP 2.1.13 (if any) and the remaining
unrevised Ancillary Services bids; and
b) the ISO will:
i) validate (in accordance with the SBP) the
Revised Day-Ahead Schedule and the revised
Ancilary Services bids referred to in (a)
above;
ii) start the second and final iteration of the
Inter-Zonal Congestion Management process in
accordance with the SP; and
iii) start the evaluation of the revised
Ancillary Services bids in accordance with
the SP.
2.1.15 BY 1:00 PM, ONE DAY AHEAD
By 1:00 pm on the day ahead of the Trading Day (or by 11:00 am if there
is no Inter-Zonal Congestion) and for each Settlement Period of that
Trading Day, the ISO will, in accordance with the SP:
a) complete the second iteration, if necessary, of the
Inter-Zonal Congestion Management process;
b) provide, via WEnet, a Final Day-Ahead Schedule to the
PX which, depending on the existence of Inter-Zonal
Congestion, could be:
i) the Preferred Day-Ahead Schedule (when no
Congestion was found at 11:00 am);
ii) the Revised Day-Ahead Schedule (when no
Congestion was found at 1:00 pm); or
iii) a modified Revised Day-Ahead Schedule if the
Revised Day-Ahead Schedule for Energy was
modified for Inter-Zonal Congestion;
c) publish on WEnet the Day-Ahead Usage Charge rates, if
any, (in $/MW of scheduled flow) for Energy transfers
between Zones; and
d) provide, via WEnet, as part of the Final Day-Ahead
Schedule, a schedule of Ancillary Services (if any)
which PX Participants have been selected to supply in
the ISO's Ancillary Services auction.
2.1.16 BY 1:15 PM, ONE DAY AHEAD
By 1:15 pm on the day ahead of the Trading Day (or by 11:15 am if there
is no Inter-Zonal Congestion), the PX will notify each PX Participant,
through the TA System, and for each Settlement Period of the Trading
Day, of the details from the Final Day-Ahead Schedule which relate to
the PX Participant in question, including Schedule changes for
Inter-Zonal Congestion Management and bids accepted in the ISO's
Ancillary Services auction.