CGoering@nyiso.com writes to the NYISO_TECH_EXCHANGE Discussion List:

The NYISO is reserving hours beginning 00:00, 02:00, 06:00 - 08:00, 17:00,
and 20:00 in the May 15, 2001 Real-Time Market as well as the following
hours per ECA20001006B to verify prices:

PJM:  0:00 - 6:00, and 23:00
OH:   1:00, 6:00, and 23:00
HQ:   1:00, 6:00, and 23:00
NE:   1:00, 6:00, and 23:00

Prices in the May 16, 2001 Day-Ahead Market are correct.

This e-mail information is a copy of the official posting which can be
found at the following address on our website:
http://mis.nyiso.com/public/htm/OperMessages/CurrentOperMessages.htm#mm