Provisions requiring purchase or lease of timeshare property by owners’ association or purchasers; validity.

In any timeshare plan in which timeshare estates or personal property timeshare interests are sold, no grant or reservation made by a declaration, lease, or other document, nor any contract made by the developer, managing entity, or owners’ association, which requires the owners’ association or purchasers to purchase or lease any portion of the timeshare property shall be valid unless approved by a majority of the purchasers other than the developer, after more than 50 percent of the timeshare periods have been sold.