The term “listing” as used in this part includes, but is not limited to:
(a) The name or a list of the names, of the owners, landlords, exchangers, or lessors, or the location or locations, of property, or of an interest in property, offered for rent, sale, lease, or exchange.
(b) The name, or a list of the names, or the location or locations at which prospective or potential purchasers, buyers, lessees, tenants or exchangers of property may be found or contacted.
(c) An agreement by which a person who is engaged in the business of promoting the sale or lease of business opportunities or real estate agrees to render to an owner or lessee of such property any services, to promote the sale or lease of said property.
(d) An agreement by which a person who is engaged in the business of finding, locating or promoting the sale or lease of business opportunities or real estate, agrees to circularize, notify or refer real estate brokers or salesperson to said property which is offered for sale or lease.