(1) "Insurer" means an authorized insurer that has premium, loss or loss adjustment expense data in Washington state for one or more of these lines of insurance:

(a) Property, as defined in RCW 48.11.040;

(b) Marine and transportation, as defined in RCW 48.11.050, if not exempt from statistical reporting under RCW 48.19.010 (1)(e);

(c) Vehicle, as defined in RCW 48.11.060;

(d) General casualty, as defined in RCW 48.11.070; and

(e) Surety, as defined in RCW 48.11.080.

(2) "NAIC Statistical Handbook" is a publication of the National Association of Insurance Commissioners (NAIC) that explains insurance statistical data and provides reporting requirements and report formats for data that statistical agents must submit to the commissioner.

(3) "Statistical agent" means an entity that the commissioner has designated under RCW 48.19.370(4) to collect insurance statistical data from insurers and report these data to the commissioner on behalf of those insurers.

(4) "Statistical plan" means a system for collecting information from insurers.