(a) For each plan of insurance with separate rates for smokers and nonsmokers, an insurer may use:(1) composite mortality tables to determine minimum reserve liabilities and minimum cash surrender values and amounts of paid-up nonforfeiture benefits;(2) smoker and nonsmoker mortality tables to determine the valuation net premiums and additional minimum reserves, if any, required by Insurance Code §425.068, Reserve Computation: Gross Premium Charged Less Than Valuation Net Premium, and use composite mortality tables to determine the basic minimum reserves, minimum cash surrender values, and amounts of paid-up nonforfeiture benefits; or(3) smoker and nonsmoker mortality tables to determine minimum reserve liabilities and minimum cash surrender values and amounts of paid-up nonforfeiture benefits.(b) For plans of insurance without separate rates for smokers and nonsmokers, the composite mortality tables must be used.(c) For the purpose of determining minimum reserve liabilities and minimum cash surrender values and amounts of paid-up nonforfeiture benefits, the 2001 CSO Mortality Table may, at the option of the company for each plan of insurance, be used in its ultimate or select and ultimate form, subject to the restrictions of §4.2725 of this title (relating to Applicability of the 2001 CSO Mortality Table to Chapter 4, Subchapter BB, Division 3 of this Title) relative to use of the select and ultimate form.