In this subchapter:
(1) "Insurance company" has the meaning assigned by Section 2053.001.
(2) "Underwriting guideline" means a rule, standard, guideline, or practice, whether written, oral, or electronic, that is used by an insurance company or its agent to decide whether to accept or reject an application for coverage under a workers' compensation insurance policy or to determine how to classify those risks that are accepted for the purpose of determining a rate.