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

The NYISO is reserving the following hours in the September 20, 2001
Real-Time Market per ECA 20010908B to verify prices:

HQ:   8:00-9:00 and 22:00
NE:   8:00-9:00 and 22:00
OH:   8:00-9:00 and 22:00
PJM:  0:00-5:00, 8:00-9:00, and 22:00

All other prices in the September 20, 2001 Real-Time Market are correct.
Prices in the September 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 of our website:
http://mis.nyiso.com/public/htm/OperMessages/CurrentOperMessages.htm#mm