In order to return a “true bill” of indictment, a majority, but in no instance less than five, of the multi-jurisdiction grand jurors must concur in that finding. A multi-jurisdiction grand jury may return a “true bill” of indictment upon the testimony of, or evidence produced by, any witness who was called by the grand jury, upon evidence presented to it by special counsel, or upon evidence sent to it by the presiding judge. Every “true bill” of indictment returned by a multi-jurisdiction grand jury shall state in which jurisdiction or jurisdictions the offense is alleged to have occurred. Thereafter, when venue is proper in more than one jurisdiction, the presiding judge who directed the grand jury proceeding shall elect in which one of the jurisdictions named in the indictment the indictment is to be prosecuted.