a. There shall be at least one State grand jury with jurisdiction extending throughout the State serving at all times.
b. The State grand jury shall be impaneled by a judge of the Superior Court designated for that purpose by the Chief Justice.
c. The Attorney General or the Director of the Division of Criminal Justice may, when they determine it to be in the public interest, apply in writing to the designated judge requesting that one or more additional State grand juries be impaneled. The judge may, for good cause shown, order the impaneling of additional State grand juries.