218.2.3. The first additional contribution rate for a year is equal to the first additional contribution rate for the preceding year to which is added the annual rate of adjustment of additional contributions determined as follows:(a) for the year that follows the calculation of the most recent difference giving rise to an adjustment,(1) –0.1% if the total rate of adjustment is equal to or less than –0.1%, or
(2) 0.1% if the total rate of adjustment is equal to or greater than 0.1%;
(b) for the second year that follows the calculation of the most recent difference giving rise to an adjustment,(1) –0.1% if the total rate of adjustment is equal to or less than –0.2%,
(2) 0.1% if the total rate of adjustment is equal to or greater than 0.2%, or
(3) 0% if the total rate of adjustment is –0.1% to 0.1%; and
(c) for the third year that follows the calculation of the most recent difference giving rise to an adjustment,(1) –0.1% if the total rate of adjustment is equal to or less than –0.3%,
(2) 0.1% if the total rate of adjustment is equal to or greater than 0.3%, or
(3) 0% if the total rate of adjustment is –0.2% to 0.2%.