And be it enacted, That it shall and may be lawful for the Lord Justice Clerk, or any One of the Lords Commissioners of Justiciary, and they are hereby authorized and empowered at any Time to direct to be summoned as Jurors to serve on any Criminal Trial in the High Court or Circuit Court of Justiciary, any such Number of Persons exceeding Forty-five, as may be deemed necessary; and it is hereby provided, that the Warrants for summoning Jurors shall only require the Signature of One of the said Judges, and it shall not be necessary to annex a Copy of the Signature of such Judge to the List of Assize served on the Accused.