(1)In relation to the things mentioned in subsection (3), each of the First-tier Tribunal and the Upper Tribunal has such powers, rights, privileges and other authority with respect to any case before it as are provided for in Tribunal Rules.
(2)Rules making provision for the purpose of subsection (1) may (in particular) do so in relation to any kind of authority by reference to any authority of a relevant description exercisable by the sheriff or the Court of Session.
(3)The things are—
(a)the citation, attendance or examination of witnesses,
(b)the recovery, production or inspection of relevant materials,
(c)the commissioning of reports of any relevant type,
(d)other procedural, evidential or similar measures.
(4)In subsection (3)(b), “materials” means documents and other items.