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

The NYISO is reserving hour beginning 00:00, 01:00, 13:00, 14:00, and 16:00
in the July 23, 2001 Real-Time market as well as the following hours per
ECA20010608B to verify prices:

HQ:  05:00, 08:00, and 11:00 - 20:00
OH:  05:00, 08:00, 11:00, 13:00, and 19:00
NE:  05:00, 08:00, 11:00, and 19:00
PJM: 05:00, 08:00, 11:00, and 19:00

In addition, the NYISO is reserving hours beginning 00:00 - 23:00 in the
July 24, 2001 Day-Ahead Market.

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