(a) Interest accrues at the rate of 10 percent per annum on the principal amount of a money judgment remaining unsatisfied.
(b) The Legislature reserves the right to change the rate of interest provided in subdivision (a) at any time to a rate of less than 10 percent per annum, regardless of the date of entry of the judgment or the date any obligation upon which the judgment is based was incurred. A change in the rate of interest may be made applicable only to the interest that accrues after the operative date of the statute that changes the rate.