Midwest ISO OASIS Maintenance Notice

The Midwest ISO OASIS will be taken off-line on Tuesday, May 15, 2007, at approximately 2025 EDT, during which the site will be upgraded. This maintenance could last as long as 30 minutes. During this time, to submit a Non-Firm next-hour transmission request while the outage is in progress, please utilize the policy set forth in Section 6.4 (Submitting Requests when OASIS is Unavailable) of the MISO TEMT Module Business Practices manual found on the Midwest ISO OASIS.