If you are a Resort Guest the "last day" rule does not apply. If you are not a Resort Guest and the 14 days has not been reached and you ask nicely at a Guest Relations there is the possibility that you will be allowed to do the upgrade. If it is done the price will be the difference between the gate price of your ticket and the gate price of an AP, and the expiration date of the AP will be one year from the date of first use of the ticket.