(1) A buyer or seller is not represented by a brokerage in a regulated real estate transaction unless the buyer or seller and the brokerage agree, in a separate written document, to such representation. No type of agency representation may be assumed by a brokerage, buyer or seller or created orally or by implication.
(2) Types of brokerage relationships. The following types of brokerage relationships are recognized: Nonagency;
(3) Agency representation;
(4) Limited dual agency representation;
(5) Limited dual agency with assigned agents.