(1) A power to employ a person under section 11 must be exercised:
(a) in accordance with any arrangements approved under paragraph (2)(a) of this section; and
(b) subject to any conditions determined under paragraph (2)(b) of this section;
that apply to the parliamentarian or office - holder, and to the power.
(2) The Prime Minister may, in writing, do either or both of the following :
(a) approve arrangements in accordance with which a parliamentarian or office - holder is to exercise a power under section 11;
(b) determine conditions subject to which a parliamentarian or office - holder is to exercise a power under section 11.
(3) An instrument made under subsection (2) is not a legislative instrument.