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

The NYISO is reserving hours beginning 02:00, 04:00, 06:00, and 14:00 - 15:00 
in
the May 9, 2001 Real-Time Market as well as the following hours per 
ECA20001006B
to verify prices:

PJM:  01:00 - 05:00, 22:00 - 23:00
OH:   22:00 - 23:00
HQ:   22:00 - 23:00
NE:   22:00 - 23:00

Prices in the May 10, 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