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

The NYISO is reserving hours-beginning 0-1, 3-14, 15-20, 22, and 23
in the 12 May 2001 real-time market to verify prices.
Prices in the 13 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:  0, 8, 11, 12, 14, 16, 17, and 20
OH:   0, 8, 11, 12, 14, 16, 17, and 20
HQ:   0, 8, 11-14,16, 17, and 20
NE:   0, 8, 11-14,16, 17, and 20