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

The NYISO is reserving hour beginning 5:00 in the December 21, 2001
Real-Time Market as well as the following hours per ECA20010908B to verify
prices:

HQ:  0:00-1:00, 6:00, 13:00, 22:00-23:00
NE:  0:00-1:00, 6:00, 13:00, 22:00-23:00
OH:  0:00-1:00, 6:00, 13:00, 22:00-23:00
PJM: 0:00-1:00, 5:00-6:00, 13:00, 22:00-23:00

Prices in the December 22, 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 of our website:
http://mis.nyiso.com/public/htm/OperMessages/CurrentOperMessages.htm#mm