(1) A licensee may not advertise, market, or offer to conduct a real estate transaction involving real estate owned, in whole or in part, by another person without first obtaining a written listing agreement between the property owner and the real estate brokerage firm with whom the licensee is associated. However, the signature of the owner of real estate is not required for a sublease agreement involving real estate if the lease allows for subletting. Licensees not associated with the listing brokerage firm may advertise real estate owned, in whole or in part, by another person only if they have written authorization from the listing brokerage firm and acknowledge the listing brokerage firm in the advertisement in a clear and conspicuous way. Authorization may be contained and obtained from the owner through the listing agreement.The advertising and marketing of real property is to be distinguished from the advertising and marketing of a contractual position in a sales agreement to purchase real estate. An advertisement that markets a contractual position to acquire real property from a person with either equitable or legal title and does not imply, suggest, or purport to sell, advertise, or market the underlying real property is permissible under this section.