Misuse of Drugs Act 1971

5 (1) For the purpose of any proceedings before a tribunal in England or Wales or Northern Ireland the tribunal may administer oaths and any party to the proceedings may sue out writs of subpoena ad testificandum and duces tecum, but no person shall be compelled under any such writ to give any evidence or produce any document which he could not be compelled to give or produce on the trial of an action.

(2) The provisions of section 49 of the [1925 c. 49.] Supreme Court of Judicature (Consolidation) Act 1925, or of the [1854 c. 34.] Attendance of Witnesses Act 1854 (which provide special procedures for the issue of such writs so as to be in force throughout the United Kingdom) shall apply in relation to any proceedings before a tribunal in England or Wales or, as the case may be, in Northern Ireland as those provisions apply in relation to causes or matters in the High Court or actions or suits pending in the High Court of Justice in Northern Ireland.

(3) For the purpose of any proceedings before a tribunal in Scotland, the tribunal may administer oaths and the Court of Session shall on the application of any party to the proceedings have the like power as in any action in that court to grant warrant for the citation of witnesses and havers to give evidence or to produce documents before the tribunal.