(A) The hazard group for an employer shall be determined as follows. The employer's
experience-rated premium for the policy year shall be allocated to the ten industry
groups used in experience rating as provided in appendix B, (table 1, part B), of
rule 4123-17-05 of the Administrative Code. The industry group producing the most
premium shall be used to determine the hazard group, unless that industry group is
group ten; in the latter case, the industry group producing the second highest
premium shall be used, unless its premium is less than ten per cent. Industry group
ten is the determining industry group only if it has the largest premium and no other
industry group has ten per cent of premium. If the determining industry group is two,
four, five, or ten, the hazard group shall be A. If the determining industry group
is six, seven, or nine, the hazard group shall be B. If the determining industry group
is one or three, the hazard group shall be C. If the determining industry group is eight,
the hazard group shall be D. For all public employer taxing districts, the hazard group
shall be that group specifically developed for such employers and as shall be periodically
established by the administrator with the advice and consent of the workers'
compensation oversight commission.
(B) The Ohio bureau of workers' compensation shall notify the employer of the estimated
minimum premium percentage based on the limits selected by the employer and the payroll
of the employer. The premium rates on the payroll reports received by the employer for
the policy year will be calculated using the minimum premium percent
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