In any two-year period a person may not be required:
(a) To serve or attend Court for prospective service as a juror more than thirty Court days, except if necessary to complete service in a particular case.
(b) To serve on more than One Grand Jury.
(c) To serve as both a Grand and Petit Juror; or
(d) To serve as a Petit Juror at more than one term of Court.