The purpose of this article is to regulate trade practice in the business of insurance in accordance with the intent of the Congress of the United States as expressed in the Act of Congress of March 9, 1945 (Public Law 15, 79th Congress), by defining, or providing for the determination of, all acts, methods, and practices which constitute unfair methods of competition or unfair or deceptive acts or practices in this State, and by prohibiting the trade practices so defined or determined.