December 7, 1999

The Honorable David P. Boergers
Secretary
Federal Energy Regulatory Commission
888 First Street, N.E.
Washington, D.C.  20426

Re:	Docket No. ER99-4545-___

Dear Secretary Boergers:

Enclosed please find an original and fourteen copies of a Notice to Market of Ability to File Disputes on Final Settlement Statements (“Notice”) issued on December 3, 1999 by the California Independent System Operator Corporation (“ISO”) pursuant to Amendment No. 22 to the California Independent System Operator Corporation FERC Electric Tariff (“ISO Tariff”).

The ISO filed Amendment No. 22 to the ISO Tariff in the above-captioned docket on September  27, 1999.  Amendment No. 22 consisted of a number of proposed modifications to the ISO Tariff, including Tariff revisions which would establish a procedure for Scheduling Coordinators to dispute new or modified charges or credits that appear for the first time on a Final Settlement Statement ("Incremental Changes").  The ISO requested that these Tariff revisions be made effective on the later of November 26, 1999 or at least ten days after the ISO posted notice on the ISO Home Page that the modified software necessary to implement these revisions was ready for use.

The Commission accepted the Tariff revisions and proposed effective dates in Amendment No. 22, subject to certain conditions, by order issued on November 24, 1999.  California Independent System Operator Corporation,  89 FERC ¶ 61,229 (1999).

The enclosed Notice states that, effective with Final Settlement Statements published on December 15, 1999 for Trade Date October 1, 1999, the ISO will accept settlement disputes of Incremental Changes that occur between Preliminary and Final Settlement Statements, pursuant to the terms of Amendment No. 22.

The ISO states that the enclosed Notice was e-mailed to Market Participants on December 3, 1999 and posted on the ISO Home Page, www.caiso.com, to satisfy the notice requirements of Amendment No. 22.  The ISO further states that it has served the Notice upon each person designated on the official service list for the above-captioned docket, as indicated in the attached certificate of service.

The ISO encloses a notice of filing suitable for publication in the Federal Register and a copy of that notice of filing in WordPerfect format on a diskette. Two extra copies of this filing are also enclosed.  Please stamp these copies with the date and time filed and return it to the messenger.

Respectfully submitted

_____________________________
Roger E. Smith, 
Senior Regulatory Counsel
The California Independent
   System Operator Corporation
151 Blue Ravine Road
Folsom, CA  95630
(916) 351-2207	_______________________________ 
Kenneth G. Jaffe
David B. Rubin
Sean A. Atkins
Swidler Berlin Shereff Friedman, LLP
3000 K Street, N.W.
Washington, D.C.  20007
(202) 424-7500	

Counsel for the California Independent 
System Operator Corporation

CERTIFICATE OF SERVICE

	I hereby certify that I have this day served the foregoing Notice upon each person designated on the service list compiled by the Secretary in the above-referenced docket.

Dated at Washington, DC, this 7th day of December, 1999.

						_______________________
						Sean A. Atkins
						Counsel for the California Independent
						System Operator Corporation