(1) A person may:
(a) for a purpose connected with a proceeding begun before the commencement of this Part, or for 2 or more such purposes, and for no other purpose, communicate to another person, make use of, or make a record of; or
(b) give in evidence in such a proceeding;
(c) obtained by intercepting a communication before that commencement, whether or not in contravention of subsection 7(1); or
(d) obtained, before that commencement, by virtue of a warrant issued under section 11A.
(2) Nothing in subsection (1) makes admissible in evidence in any proceedings information, obtained by virtue of a warrant that was defective, that would not have been admissible in those proceedings if that subsection had not been enacted.
(3) For the purposes of this section, a proceeding by way of a prosecution of a person on indictment for an offence shall be deemed to have begun before the commencement of this Part if a proceeding with a view to the committal of the person for trial for the offence began before that commencement.
(4) For the purposes of this section, a proceeding by way of an appeal from, or otherwise arising out of, another proceeding shall be deemed to have begun before the commencement of this Part if the other proceeding began, or by virtue of any other application or applications of this section is deemed to have begun, before that commencement.