In section 63 of the [1945 c. 17.] Local Government (Scotland) Act 1973 (arrangements as to police authority functions etc.), after subsection (2) there shall be inserted—
“(2A)The officers who may discharge functions of a police authority in pursuance of arrangements under section 56(1) or (2) of this Act shall include the chief constable of the police force.
(2B)
Where, pursuant to arrangements made by virtue of subsection (2A) above, a chief constable may discharge functions of a police authority, he may himself arrange for the discharge of any of the functions in question by a constable of the police force or by a person who is employed by the authority but is not under their direction and control.”.