January 4, 2000

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

Re:	California Independent System Operator Corp.
	Docket No. ER00-866-000

Dear Secretary Boergers:

	The California Independent System Operator Corporation ("ISO") submits the following letter in response to a request from the Commission Staff that the ISO address the time-frame in which the Commission will act in the above-captioned docket.

	On December 21, 1999, the ISO filed Amendment No. 24 to the ISO Tariff in the above-captioned docket.  The Commission issued a Notice of Filing regarding Amendment No. 24 on December 27, 1999.  The Commission Staff has recently requested that the ISO authorize the Commission to defer the final date for rendering a decision on Amendment No. 24 from February 19, 2000 to February 23, 2000, the latter being when the Commission will consider its February agenda.  The ISO has no objection to the Commission acting on Amendment No. 24 at any time up until February 23.

	An additional copy of this letter is provided to be time-stamped and returned to our messenger.  Thank you for your assistance in this matter.

Respectfully submitted,

					___________________________
Kenneth G. Jaffe
Bradley R. Miliauskas
Swidler Berlin Shereff Friedman, llp
3000 K Street, N.W.
Washington D.C.  20007

Counsel for the California
Independent System Operator Corporation