checked out the make a wish code at a random hotel and this is the rate description that came out.. Seems quite specific:
Rate Description:
Special negotiated rate. Valid for Wish related travel, including non-group travel for employees as well as for families being granted wishes. -Reservations must be booked by a MAW employee - families cannot book their own reservations. -MAW employee must provide CR number. -Guest must provide proof of Wish related travel at check-in. -Families will have a letter from Make A Wish to present upon check-in. -Employees will present an employee ID or a Make a Wish Foundation business card at check in.