A grand jury shall be composed of twelve (12) persons, any nine (9) of whom concurring may find an indictment or true bill. A grand jury shall be convened upon the order of a district judge upon his own motion; or such grand jury shall be ordered by a district judge upon the filing of a petition therefor signed by qualified electors of the county equal to the number of signatures required to propose legislation by a county by initiative petition as provided in Section 5 of Article V of the Oklahoma Constitution, with the minimum number of required signatures being five hundred (500) and the maximum being five thousand (5,000); and further providing that in any calendar year in which a grand jury has been convened pursuant to a petition therefor, then any subsequent petition filed during the same calendar year shall require double the minimum number of signatures as were required hereunder for the first petition; or such grand jury shall be ordered convened upon the filing of a verified application by the Attorney General of the State of Oklahoma who shall have authority to conduct the grand jury in investigating crimes which are alleged to have been committed in said county or involving multicounty criminal activities; when so assembled such grand jury shall have power to inquire into and return indictments for all character and grades of crime. All other provisions of the Constitution or the laws of this state in conflict with the provisions of this constitutional amendment are hereby expressly repealed.

The Legislature shall enact laws to prevent corruption in making, filing, circulating and submitting petitions calling for convening a grand jury.