July 28, 1998

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

Re:	The California Independent System Operator Corporation, Amendment No. 10 to ISO Tariff – Errata

Dear Secretary Boergers:

	It has come to our attention that the letter accompanying the July 27, 1998, filing  of Amendment No. 10 to the ISO Tariff and Protocols, which are the ISO’s FERC Electric Tariff, Original Volume No. 1, included certain errors.  In particular, the reference line of the letter referred to implementation of Firm Transmission Rights, the letter was mislabeled as privileged and confidential, and certain references were omitted from footnote 2.   Finally, it appears that the shaded portion of the redline version of the amendments was not reproduced by the copy machine on certain copies.

	I am therefore enclosing six copies of a corrected version of the transmittal letter and six new copies of the redline version of the amendments.

							Respectfully submitted,

N. Beth Emery					Edward Berlin
Vice President and General Counsel		Kenneth G. Jaffe
Roger Smith						Michael E. Ward
Regulatory Counsel					Swidler & Berlin, Chartered
The California Independent System		Counsel for The California 
     Operator Corporation					Independent System
						 		Operator System