(1) Section 81 does not prevent the application of the hearsay rule or opinion rule to evidence of an admission in relation to the case of a third party.
(2) The evidence may be used in relation to the case of a third party if the third party consents.
(3) Consent cannot be given in relation to part only of the evidence.
(4) In this section:
"third party" means a party to the proceeding, other than the party who—
(a) made the admission; or
(b) presented the evidence.