(1)A person who is a designated person for the purposes of section 6 or 7 above by reference to the office, rank or position with a police force held by that person shall not grant an authorisation under that section except on an application made by a member of the same force.
(2)A chief constable of a police force shall not grant an authorisation for the carrying out of intrusive surveillance except—
(a)on an application made by a member of the same force; and
(b)in the case of an authorisation for the carrying out of intrusive surveillance in relation to any residential premises, where those premises are in the area of operation of that force.
(3)A chief constable of a police force may grant an authorisation for the carrying out of intrusive surveillance on the application of a constable seconded to the Scottish Crime Squad if—
(a)in the case of an authorisation for the carrying out of intrusive surveillance in relation to any residential premises, those premises are in; and
(b)in the case of an authorisation for the carrying out of intrusive surveillance in relation to any private vehicle, the chief constable is satisfied that the surveillance operation will commence in,
the area of operation of that chief constable’s police force.
(4)A single authorisation may combine both—
(a)an authorisation granted under this Act by, or on the application of, an individual who is a member of a police force; and
(b)an authorisation given by, or on the application of, that individual under Part III of the Police Act 1997 (c. 50) (authorisation of interference with property and wireless telegraphy) insofar as relating to a police force,
but the provisions of this Act or the 1997 Act that are applicable in the case of each of the authorisations shall apply separately in relation to the part of the combined authorisation to which they are applicable.
(5)For the purposes of this section, the area of operation of a police force is the area for which that force is maintained.