191—101.2 (523A,82GA,SF559) Amount of trust income withdrawn. The amount of income withdrawn pursuant to rule 101.1(523A,82GA,SF559) may not exceed the difference between the amount needed to adjust the trust funds for inflation, as set by the commissioner based on the consumer price index in rule 101.7(523A,82GA,SF559), and the interest or income earned during the preceding year but, in any event, may not exceed 50 percent of the total interest or income on a calendar-year basis. A portion of trust income must remain in trust and cannot be withdrawn by the preneed seller. This amount is the greater of the following: one-half of the aggregate income and interest credited to the trust during the preceding calendar year; or an amount equal to the consumer price index adjustment for the preceding year.