3.—(1) This Part applies to the grant or renewal of an authorisation for the conduct or use of a source to—
(a)obtain communications subject to legal privilege;
(b)provide access to any communications subject to legal privilege to another person; or
(c)disclose communications subject to legal privilege.
(2) Where a single authorisation authorises conduct mentioned in paragraph (1) and other conduct authorised by the Act, this Part applies only in relation to those parts of the combined authorisation which authorise conduct mentioned in paragraph (1).