(1) Subject to section 17, it shall be a defence to a defamation action for the defendant to prove that the statement in respect of which the action was brought would, if it had been made immediately before the commencement of this section, have been considered under the law (other than the Act of 1961) in force immediately before such commencement as having been made on an occasion of qualified privilege.

(2) Without prejudice to the generality of subsection (1), it shall, subject to section 19, be a defence to a defamation action for the defendant to prove that -

(a) the statement was published to a person or persons who -

(i) had a duty to receive, or interest in receiving, the information contained in the statement, or

(ii) the defendant believed upon reasonable grounds that the said person or persons had such a duty or interest, and

(b) the defendant had a corresponding duty to communicate, or interest in communicating, the information to such person or persons.