Description: The Standard Nonforfeiture Law requires that the mortality table and interest rate provided in the policy for the calculation of cash surrender values and of nonforfeiture paid-up insurance be the same, say Basis A. It also contemplates that, if desired, a more stringent Basis B may be provided for calculating the present value of extended term insurance, using mortality rates up to 130% those of Basis A. From Transactions of Society of Actuaries 1958, Vol. 10, No. 28.