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

The NYISO is reserving hours-beginning 0, 2, 5, and 7-23 in the 5 May 2001
real-time market to verify prices.
Prices in the 6 May 2001 Day-Ahead market are correct.
Pursuant to ECA-B the NYISO is reserving the following hours at the following
external proxy buses:
PJM:  1-5, 7
OH:    1, 4, 7
HQ:    1, 3, 4, 7
NE:    0, 1, 4, 7, 17, 18