For the purpose of this chapter, the kinds of insurance defined in Chapter 7 of this title shall be arranged in the following six classes:
(1) Life, accident, and sickness;
(2) Property, marine, and transportation;
(3) Casualty; (4) Surety; (5) Title; and
(6) Health maintenance organization.
Each of the groups numbered (1) through (6) shall constitute a class of
insurance.