(1) the plan has been continuously in existence since December 31, 1978;
(2) the plan requires all eligible judges to participate and contribute the same fixed percentage of their basic or regular compensation;
(3) the plan provides no judge with an option as to contributions or benefits, which, if exercised, would affect the amount of his or her includable compensation;
(4) retirement benefits under the plan are a percentage of the compensation of judges holding similar positions in the state; and
(5) benefits paid to any participant in any year do not exceed the limitation of IRC Section 415(b) ( Q 3868).1