Section 2B:22-2 - Powers and duties of State grand jurya. A State grand jury shall have the same powers and duties and shall function in the same manner as a county grand jury except that its jurisdiction shall extend throughout the State. The law applicable to county grand juries shall apply to State grand juries to the extent that it is consistent with the specific provisions relating to State grand juries.b. The Supreme Court may promulgate rules to govern particularly the procedures of State grand juries.