In this chapter:
(1) "Insurer" means an insurance company or other legal entity authorized to engage in the business of insurance in this state, including a reciprocal or interinsurance exchange, a Lloyd's plan, and a county mutual insurance company. The term includes an affiliate. The term does not include a farm mutual insurance company or an eligible surplus lines insurer regulated under Chapter 981.
(2) "Rating territory" means a rating territory established by the department.