'(1) The President of the High Court shall from time to time after consulting with the Minister invite a person who is a judge of the High Court to undertake (while serving as such a judge) the duties specified in this section and section 65 of the Criminal Justice (Terrorist Offences) Act 2005 and, if the invitation is accepted, the Government shall designate the judge for the purposes of this Act and the Criminal Justice (Terrorist Offences) Act 2005.