12This Part of this Schedule applies in relation to devolution issues in proceedings in Scotland.
13(1)Proceedings for the determination of a devolution issue may be instituted by the Advocate General for Scotland.
(2)Sub-paragraph (1) does not limit any power to institute proceedings exercisable apart from that sub-paragraph by any person.
14(1)A court or tribunal shall order intimation of any devolution issue which arises in any proceedings before it to be given to the Advocate General for Scotland and the Assembly (unless a party to the proceedings).
(2)A person to whom intimation is given in pursuance of sub-paragraph (1) may take part as a party in the proceedings, so far as they relate to a devolution issue.
15A court, other than any court consisting of three or more judges of the Court of Session or the House of Lords, may refer any devolution issue which arises in civil proceedings before it to the Inner House of the Court of Session.
16A tribunal from which there is no appeal shall refer any devolution issue which arises in proceedings before it to the Inner House of the Court of Session; and any other tribunal may make such a reference.
17A court, other than any court consisting of two or more judges of the High Court of Justiciary, may refer any devolution issue which arises in criminal proceedings before it to the High Court of Justiciary.
18Any court consisting of three or more judges of the Court of Session may refer any devolution issue which arises in proceedings before it (otherwise than on a reference under paragraph 15 or 16) to the Judicial Committee.
19Any court consisting of two or more judges of the High Court of Justiciary may refer any devolution issue which arises in proceedings before it (otherwise than on a reference under paragraph 17) to the Judicial Committee.
20An appeal against a determination of a devolution issue by the Inner House of the Court of Session on a reference under paragraph 15 or 16 shall lie to the Judicial Committee.
21An appeal against a determination of a devolution issue by—
(a)a court of two or more judges of the High Court of Justiciary (whether in the ordinary course of proceedings or on a reference under paragraph 17), or
(b)a court of three or more judges of the Court of Session from which there is no appeal to the House of Lords,
shall lie to the Judicial Committee, but only with leave of the court concerned or, failing such leave, with special leave of the Judicial Committee.