The Property Owners Association's governing documents contain the rules, regulations, and all other contractual terms that members are bound by. If a property is part of an association, membership is automatic when you purchase that property.
For this reason, most state laws require the sellers to disclose to the prospective purchasers that the home being considered is part of an association. The law also obligates the seller to disclose the association's contact information and documents governing the use and occupancy of the property.