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From:rbowers@nyiso.com
To:tie_list_server@nyiso.com
Subject:December 1999 2nd Settlement Adjustment Invoice Banking
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Date:Fri, 28 Sep 2001 14:39:31 -0700 (PDT)

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The invoices for December 1999 settlement adjustments will be posted by
23:00 today, Friday, September 28, 2001. The NYISO apologizes for any
inconvenience resulting in the delay in posting these invoices.

Transmission Customers will observe adjustments to their settlements to:
(1) recover costs related to adjustments made outside of the billing
process; (2) adjust regulation penalty charges to zero for suppliers; and
(3) adjust the NYISO clearing account balance to zero for December 1999
settlements.

With regard to the adjustments made outside of the billing process, these
adjustments could not have been corrected by a billing code or determinant
data fix. As a result, the mechanism of paying and funding the adjustments
is done outside of the billing process. The total adjustment of
$581,563.37 was allocated across 13,147,961 MWh. Customers may validate
their respective adjustments by computing their ratio shares of the
$581,563.37 using 5,059,790 MWh as the denominator in their respective
ratios of their December 1999 load. Customers will observe a difference in
the denominators used in the ratio share allocation of this adjustment
versus adjustment #3. This is due to the fact that the costs for
adjustment #1 are not allocated to those that received payment through the
adjustment, which would defeat the purpose of the adjustment.

Prior to October 2000, the NYISO recovered or refunded differences in the
revenue received from Schedule 1 charges, which were comprised of
forecasted uplift & residual adjustments, and the costs actually incurred
by adjusting subsequent month's Schedule 1 rates accordingly. In October
2000, the NYISO implemented a change in the tariffed Schedule 1 provisions
that allowed the recovery and refund of these costs as they were incurred.
In order to allow any changes in uplift and residual adjustments to be
settled through the settlement adjustment process, the code implemented in
October 2000 was used to report these costs to the market. This results in
an over-collection which is being returned to Customers through an
adjustment to their monthly balances. This billing treatment for the
December 1999 settlement adjustments resulted in credits to the market
totaling $5,219,402.09 allocated across 13,191,237 MWh. Customers where
allocated their portion of adjustment #3 above, based upon their respective
ratio shares of the 13,191,237 MWh of NYISO transmission service billed for
the month.

December 1999 settlement adjustment settlement dates have been changed to
address the delay in invoicing. Payments due to the NYISO for December
1999 settlement adjustments are due to be received in the NYISO clearing
account on Monday, October 15, 2001. Payments due to market participants
will be made on Friday, October 19, 2001. Please refer to the attachment
below for banking instructions.

Regards,
Randy A. Bowers
Manager - Customer Settlements

(See attached file: December_1999_2nd_Settlement
Adjustment_Invoice_Banking_Instructions.PDF)
- December_1999_2nd_Settlement Adjustment_Invoice_Banking_Instructions.PDF