(1)  Section 81 does not prevent the application of the hearsay rule or the opinion rule to evidence of an admission in respect of the case of a third party.

(2)  The evidence may be used in respect of the case of a third party if that party consents.

(3)  Consent cannot be given in respect of only part of the evidence.

(4)  In this section,

third party means a party to the proceeding concerned, other than a party who –

(a) made the admission; or

(b) adduced the evidence.