(1) The state controller shall deduct from the monthly compensation of each justice and judge now holding office, and from the monthly compensation of each person who shall thereafter assume by election or appointment the office of a justice of the supreme court, a judge of the court of appeals or a judge of a district court, an amount equal to the following percentages of his monthly compensation, and shall issue to such justice or judge a salary warrant in such reduced amount, and shall pay the withheld sums into the judges’ retirement fund; provided, however, that after twenty (20) years of service no deductions shall be taken from a judge’s compensation for payment to the judges’ retirement fund:
(a)  On and after July 1, 2012, and prior to July 1, 2013, seven and sixty-nine hundredths percent (7.69%).
(b)  On and after July 1, 2013, and prior to the date on which section 1-2004B, Idaho Code, shall be in full force and effect, nine percent (9%).
(c)  On and after the date on which section 1-2004B, Idaho Code, shall be in full force and effect, nine percent (9%) or such other percentage as may be determined pursuant to section 1-2004B, Idaho Code.
(2)  Between the first and twentieth day of each month, the supreme court shall, from appropriations made for that purpose as part of the employer’s contribution, remit to the judges’ retirement fund an amount equal to the following percentages of salaries paid during the previous month to justices and judges who are making contributions to the judges’ retirement fund:
(a)  On and after July 1, 2012, and prior to July 1, 2013, eight and ninety-seven hundredths percent (8.97%).
(b)  On and after July 1, 2013, and prior to the date on which section 1-2004A, Idaho Code, shall be in full force and effect, ten and five-tenths percent (10.5%).
(c)  On and after the date on which section 1-2004A, Idaho Code, shall be in full force and effect, ten and five-tenths percent (10.5%) or such other percentage as may be determined pursuant to section 1-2004A, Idaho Code.