California ISO Conformed Tariff as of September 16, 2004

The Tariff is current through September 16, 2004. Currently effective language from Tariff Amendments and compliance filings which FERC has approved is shown in clean copy. Pending language from compliance filings that FERC has not ruled on as of September 16, 2004, but whose proposed effective date has already arrived, is shown in highlight.

Note that where such pending compliance filing language will supersede currently approved language, it will be necessary to consult previous versions of the Tariff to see the full text of the language superseded by the highlighted pending language.

PLEASE NOTE that this Conformed Tariff DOES NOT REFLECT THE MRTU PHASE 1B PROVISIONS WHICH WENT INTO EFFECT ON OCTOBER 1, 2004. It is updated ONLY through September 16, and thus ONLY reflects tariff language effective as of that date. The ISO is in the process of preparing a Conformed Tariff updated to reflect the implementation of MRTU Phase 1B, which will be posted on the ISO website as soon as possible during the week beginning October 4, 2004. Until that time, the MRTU supplementary Tab (Tab 1) posted below contains all the MRTU Phase 1B provisions now in effect.

The Tariff does not include Tariff Amendments submitted to the Commission but not yet approved (e.g. Amendments 62, 63, etc.).

This version updates the August 10, 2004 version of the Conformed Tariff to reflect:

• The approval of Amendment 61 by FERC on August 17, 2004 (see Order on Amendment 61 at 108 FERC 61,193) with modifications as ordered by FERC and reflected in the ISO’s Amendment 61 Compliance filing made on September 16, 2004. The new Amendment 61 language can be found on pages 204A, 204A.01, 205 and 205A; those changes proposed in the September 16 compliance filing are shown in highlight. [These pages are contained in the PDF document below numbered 03, as well as in the Combined Tariff PDF document.] For the specific content of the changes, compare the current Conformed Tariff to the August 10, 2004 version http://www.caiso.com/docs/2001/01/22/200101221229006730.html, and review the blackline changes shown in Attachment B to the ISO’s Amendment 61 filing of June 18, 2004, and Attachment C to the ISO’s Amendment 61 Compliance Filing of September 16, 2004, available at the Tariff Amendments section of the ISO website;

• The acceptance by FERC, on September 15, 2004, of the tariff sheets comprising the new Dynamic Scheduling Protocol proposed by the ISO in its Amendment 59 Compliance Filing made on June 29, 2004 (see Letter Order issued September 15, 2004 in Docket ER04-793-001). The Dynamic Scheduling Protocol (DSP) was shown in the previous version of the Conformed Tariff in highlight; now that it has been accepted, the highlighting has been removed. [These pages are contained in the PDF document below numbered 25, as well as in the Combined Tariff PDF document.]

Following the Tariff itself, five tabbed supplementary sections (corresponding to the ISO’s MRTU filings, the Amendment 55 Oversight & Investigations filings, the December 15, 2003 Must-Offer Obligation compliance filing, the Amendment 60 provisions on Allocation of Minimum Load Costs, and new Section 5.11.6.2 on Security Constrained Unit Commitment (SCUC) applications, respectively) are provided which include language which is not effective as of September 16, 2004. Tariff language that is approved but not yet effective is included in the clean copy of these supplementary sections; Tariff language from pending compliance filings is shown in highlight.

The current version of Tab 1 reflects changes to the August 10, 2004, version made as a result of the approval of Amendment 58 (see Order at 108 FERC 61,141) and the approval of the ISO’s November 21, 2003, Compliance Filing to Amendment 54 (see Order on Rehearing and Compliance at 108 FERC 61,142) with modifications as ordered by FERC and reflected in the ISO’s related Amendment 54 and Amendment 58 Compliance Filings made on September 7, 2004. The newly approved Amendment 54 and Amendment 58 language can be found in Tab 1, on pages 109, 184E, 184E.01, 213, 213.00, 247.01, 247.02, 247A, 247B, 247C, 247C.00, 247C.01, 247D, 308, 352, 352A, 565, 694C, 694D, 694E, 694G, 694H, 879, 880, 881, 882, 883, 883A, 884, and 884A; those changes proposed in the September 7 compliance filings are shown in highlight. For the specific content of these changes, consult Attachment B to the ISO’s November 21, 2003, filing, Attachment B to the ISO’s March 2, 2004, Amendment 58 filing, and the attachments labeled “Attachment B” to the ISO’s Amendment 54 and Amendment 58 Compliance Filings of September 7, 2004, available at the Tariff Amendments section of the ISO website. Note that proposed language from the November 21, 2003 compliance filing was reflected in highlight in previous versions of Tab 1; where that language has been approved, the highlighting has been removed.