A. The retirement benefits being paid on July 1, 1980 to justices and judges who retired on or after January 1, 1978 and on or before July 1, 1980 shall be increased by ten percent, provided that no increase shall be less than six hundred dollars per annum or more than twenty-four hundred dollars per annum.
B. The provisions of this Section shall apply only to justices and judges who are receiving retirement benefits governed by the provisions of the noncontributory judges retirement plan and shall not apply to those persons whose retirement is governed by the provisions of the contributory retirement plan for judges and officers of the court established by R.S. 11:551 et seq. as part of the Louisiana State Employees' Retirement System.
C. The provisions of this Section shall not be retroactive, and the benefit increases herein provided shall be effective only on and after July 1, 1980.