(a) Whenever any county within a judicial circuit supplements the state salary paid to active superior court judges or the district attorney of said circuit, the governing authority of such county shall be authorized, but not required, to supplement the benefit being paid pursuant to this chapter to any retired superior court judge or district attorney of said circuit who is receiving benefits pursuant to this chapter or to supplement the benefit being paid pursuant to this chapter to any beneficiary of any deceased superior court judge or district attorney.

(b) Whenever any county which has a state court supplements the salary of the judges or solicitors-general of such court, the governing authority of such county shall be authorized, but not required, to supplement the benefit being paid pursuant to this chapter to any retired state court judge of such court who is receiving benefits pursuant to this chapter or supplement the benefit being paid pursuant to this chapter to any beneficiary of any deceased state court judge.