(1)Where—
(a)any function is exercisable by, or anything falls to be done in relation to, the senior judge of the Inner House by virtue of section 1 or 2; and
(b)that judge is unavailable,
the function is exercisable by, or the thing falls to be done in relation to, the second senior judge of the Inner House.
(2)Where—
(a)any function is exercisable by, or anything falls to be done in relation to, the second senior judge of the Inner House by virtue of section 2(2)(c) or (d) or subsection (1) of this section; and
(b)that judge is unavailable,
the function is exercisable by, or the thing falls to be done in relation to, the next senior judge of the Inner House who is available.