You need to book a specific rate. The certificate only applies to the room rate and tax, so I would imagine you will be liable for the resort fee.
The Certificate is valid for one complimentary room night on the second night of a paid Ambassador Weekend rate "AMB Certificate" booking and may only be booked on intercontinental.com/AMBWeekend Link will open in new browser window. or by contacting the Ambassador Service Centre at
[email protected]. The Certificate is not valid on any other rates.
The Certificate is valid for room and tax only.
http://www.ihg.com/intercontinental/...rms-conditions