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

The NYISO is reserving hours beginning 00:00 - 07:00 and 20:00 in the May
20, 2001 Real-Time Market as well as the following hours per ECA20001006B
to verify prices:

PJM: 0:00, 14:00 - 17:00, 19:00, 20:00
OH:  14:00 - 17:00, 19:00, 20:00
HQ:  3:00 - 4:00, 6:00 - 7:00, 14:00 - 17:00, 19:00, 20:00
NE:  14:00 - 17:00, 19:00, 20:00

Prices in the May 21, 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