A. Except as provided in subsections B and C of this section, every rating organization and every insurer that transacts workers’ compensation insurance in this state shall adhere to plans approved by the director as the uniform statistical plan, uniform classification plan and uniform experience rating plan for the state.

B. A rating organization may use its own statistical plan to the extent that the statistical plan does not materially conflict with the uniform statistical plan for the purposes of making all reports to the statistical agent designated by the director pursuant to section 20-371, subsection D. The rating organization shall file its statistical plan with the director and receive the director’s approval before using its own statistical plan.

C. An insurer may directly or through the rating organization of which it is a member develop subclassifications of the uniform classification plan. The insurer, or a rating organization on the insurer’s behalf, shall file each subclassification and the rate for the subclassification with the director, and they shall be on file for a waiting period of at least fifteen days before they become effective. The director shall disapprove the subclassification if the insurer fails to demonstrate that the data produced by the subclassification can be reported consistently with the uniform classification plan and uniform statistical plan or the rate of the subclassification does not meet the standards of section 20-356, paragraph 1.