There is a 7 day rule but it is not a limitation to length of stay. You can book starting 11 months out from intended date of arrival at home resort or 7 at others. When you call exactly 11 months out from date of arrival, you can book a maximum of 7 nights at that time. You can call the next day and add another, etc. (same rule when calling exactly 7 months out). If you wait to call later, e.g., 10 months out at home resort, or 6 at another, there is no 7 day limitation. Why would anyone call exactly 11 months out? Certain times of year, e.g., Christmas week, can fill very quickly at the 11 month window; also Grand Villas can go very fast at the 11 month window almost any time of year.