Person in the business of selling or renting dwellings
Person in the business of selling or renting dwellings means any person who:
(a) Within the preceding twelve months, has participated as principal in three or more transactions involving the sale or rental of any dwelling or any interest therein;
(b) Within the preceding twelve months, has participated as agent, other than in the sale of his or her own personal residence, in providing sales or rental facilities or sales or rental services in two or more transactions involving the sale or rental of any dwelling or any interest therein; or
(c) Is the owner of any dwelling designed or intended for occupancy by, or occupied by, five or more families.