Paragraph 22
(1)
Every individual aged under 75 holding a pensionable office is to participate in the scheme as an “office-holder member” (unless the individual opts out under rule 24).
(2)
An individual holds a pensionable office by being—
(a)
the Presiding Officer,
(b)
a deputy Presiding Officer,
(c)
one of the Scottish Ministers, or
(d)
a junior Scottish Minister.