The premium charged for credit life insurance policies issued under the net payoff balance method and having all policy provisions not less favorable to the insured debtor than those permitted by Regulation .13 of this chapter, may not exceed the following: For single premium decreasing term policies insuring one life, a premium based on $0.66 per $1,000 of the sum of the scheduled insured outstanding principal indebtedness each month over the term of insurance coverage; or For joint life policies, the premium determined in accordance with Regulation .10D of this chapter. The prima facie premium rates for credit life insurance in this regulation apply to all premiums charged on or after March 1, 2001 for every class of business.