Originally Posted by Starwood Lurker

This is what the Terms and Conditions of Membership say about this:

9.3 Advance Upgrade Awards.

Members may redeem Starpoints for advance upgrades for Specialty Rooms, Specialty Select Rooms, or Suites (“Advance Upgrade Awards”). Advance Upgrade Awards may be (a) used when paying a Regular (RACK), Starwood Executive (SET), Corporate (COR), or Best Available (BAR) rate plan only, (b) confirmed within five days of arrival only, and (c) subject to blackout dates and availability restrictions.

Best regards,

William R. Sanders
Online Guest Feedback Coordinator
Starwood Hotels & Resorts Worldwide

[email protected]