(1) Where the plaintiff in a defamation action serves on the defendant any pleading containing assertions or allegations of fact, the plaintiff (or in the case of a defamation action brought on behalf of an infant or person of unsound mind by a next friend or a committee of the infant or person, the next friend or committee) shall swear an affidavit verifying those assertions or allegations.

(2) Where the defendant in a defamation action serves on the plaintiff any pleading containing assertions or allegations of fact, the defendant shall swear an affidavit verifying those assertions or allegations.

(3) Where a defamation action is brought on behalf of an infant or a person of unsound mind by a next friend or a committee of the infant or person, an affidavit to which subsection (1) applies sworn by the next friend or committee concerned shall, in respect of assertions or allegations, of which he or she does not have personal knowledge, state that he or she honestly believes the assertions or allegations, to be true.

(4) Where the plaintiff or defendant in a defamation action is a body corporate, the person swearing the affidavit on behalf of the body corporate under subsection (1) or (2), as the case may be, shall, in respect of assertions or allegations, of which he or she does not have personal knowledge, state that he or she honestly believes the assertions or allegations to be true.