If you get their agreement, they ask you to waive any conditions that you may have had prior (points, time of year, type of unit etc.) They only state that if you pay your money, if a unit is "available" will they honour your request for a unit but it could be in the summer or when it is not suitable to the former ts owner. It sounds that they want you to waive any rights you have in order to resell the units in the complex.