(1)    One day or one trial. The judges in any circuit may establish a system in which a person summoned under s. 756.05 may not be required to serve or attend court for prospective service as a petit juror for more than one day in a specified period, unless more days are necessary to complete service in a particular case. The specified period may not be less than 2 nor more than 4 years. In circuits where judges have established such a system, a petit juror whose deliberation ends with a verdict may not be required to participate in a 2nd trial even though the juror may not have completed the first day of juror service at the time of commencement of the 2nd trial.

   (2)   General 4-year eligibility. In a county where a system has not been established under sub. (1), a person may be required to be available for service as a grand or petit juror only once in any 4-year period. The period for which any person may be required to be available for service may not exceed 31 consecutive days. No person may be required to serve, or attend court for prospective service, as a juror for a total of more than 5 days unless more days are necessary to complete service in a particular case.