(1) The Chief Health Officer by instrument may delegate to a registered medical practitioner—
(a) who is an executive within the meaning of section 4(1) of the Public Administration Act 2004 ; or
(b) who is a prescribed senior officer—
any power, duty or function of the Chief Health Officer other than this power of delegation.
(2) A delegation under subsection (1) may be made—
(a) in relation to a person or class of persons specified in the instrument of delegation; or
(b) in relation to the holder, or the holder from time to time, of an office specified, or of each office in a class of offices specified, in the instrument of delegation.