Definitions for "RATING BUREAU"
An organization that gathers statistics, computes rates, develops form documents and provides services for Property & Casualty insurers affiliated with it.
See NCCI. Some states (i.e.  California, Delaware, Hawaii, Indiana, Massachusetts, Michigan, Minnesota, New Jersey, New York, North Carolina, Pennsylvania, Texas, and Wyoming) maintain their own separate rating bureau, although these states often follow NCCI rules and use NCCI manuals.
An association of insurers which: makes rates for the use of its affiliated insurers; devises territorial classifications, rating plans, schedules, manuals, policy forms and building inspections; and performs related functions for companies.