(a) General rule.--Should the investigating grand jury determine that upon the basis of evidence presented to it a presentment should be returned against an individual, the grand jury shall direct the attorney for the Commonwealth to prepare a presentment which shall be submitted to the investigating grand jury for a vote. Should a majority of the full grand jury vote approval for the presentment it shall then be submitted to the supervising judge. The supervising judge shall examine the presentment, and if it is within the authority of the investigating grand jury and is otherwise in accordance with the provisions of this subchapter, the supervising judge shall issue an order accepting the presentment. Otherwise, the supervising judge shall refuse to accept the presentment and shall order that the investigating grand jury take further appropriate action.

(b) Sealed presentment.--The supervising judge to whom a presentment is submitted may, on his own motion or at the request of the Commonwealth, direct that the presentment be kept secret until the defendant is in custody or has been released pending trial. In directing that the presentment be kept secret, the supervising judge shall enter an order requiring that the presentment be sealed and that no person shall disclose a return of the presentment except when necessary for issuance and execution of process.

(c) Prosecution by Attorney General.--Whenever a multicounty investigating grand jury returns a presentment against any person the Attorney General or his designee shall, with respect to the alleged criminal activities, be authorized to prosecute the person on behalf of the Commonwealth by instituting criminal proceedings in the county of appropriate venue. The Attorney General or his designee shall take the oath of office required by law to be taken of district attorneys, and shall be clothed with all the powers and subject to all the liabilities imposed upon district attorneys by law.

(d) Venue.--In any case where a multicounty investigating grand jury returns a presentment the supervising judge shall select the county for conducting the trial from among those counties having jurisdiction.

(e) Procedure following presentment.--When the attorney for the Commonwealth proceeds on the basis of a presentment, a complaint shall be filed and the defendant shall be entitled to a preliminary hearing as in other criminal proceedings.