N.M. Code R. § 13.8.2.21
B. Rates for assigned risk plans and other residual market plans may be based on:
(1) the plan's own premiums, investment income, loss and expense data, and other statutory factors;
(2) premiums, investment income, loss and expense data, and other statutory factors for all New Mexico risks in the line of business as a whole; provided, that if this option is used, a reasonable, actuarially-justified surcharge may be provided to reflect any demonstrated difference between projected loss and expense experience for the plan and for the line of business as a whole. Such surcharge shall be justified on the basis of comparative loss and expense experience for at least two recent consecutive years; or
(3) any other reasonable method meeting statutory standards and approved by the superintendent.
[7-1-97; 13.8.2.21 NMAC - Rn, 13 NMAC 8.2.21, 1-15-02; A, 3-1-06]