.04 Business and Industry Classifications.

A. A group may be formed only by employers who are engaged in the same or a similar type of business or who are members of the same bona fide trade or professional association which has been in existence for not less than 5 years.

B. For the first 5 years of its existence or until such time as the self-insured group's experience is such that its data becomes fully credible, a group shall classify employees as set forth in the Basic Manual for Workers' Compensation and Employees Liability Insurance (2001 Edition), published by the National Council on Compensation Insurance (NCCI).

C. If the group submits justification to the Commissioner showing that it has fully credible data from which a change in classification could be supported from an actuarial perspective and what the deviation from the NCCI classification would be and the Commissioner approves same, then the group may use such classifications.