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

The NYISO is reserving the following hours in the April 22, 2001 Real-Time
Market per ECA20001006B to verify external prices:
PJM:  7:00 and 18:00
NE:   2:00, 4:00, 7:00, 11:00, 12:00, 14:00-18:00, 20:00, and 21:00
HQ:   6:00-8:00 and 18:00
OH:   7:00 and 18:00
All other prices in the April 22, 2001 Real-Time Market are correct.

The NYISO is also reserving hours 00:00-23:00 in the April 23, 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