Mental Capacity Act (Northern Ireland) 2016

17.—(1) This paragraph applies where a person (a “representative”) in purported exercise of an authority to act on behalf of an adult enters into a transaction with a third party.

(2) The validity of the transaction may not be questioned in proceedings, nor may the third party be held liable, merely because—

(a) where the representative and third party are in Northern Ireland when entering into the transaction, sub-paragraph (3) applies;

(b) where they are in another country at that time, sub-paragraph (4) applies.

(3) This sub-paragraph applies if—

(a) the law applicable to the authority in one or more respects is, as a result of this Schedule, the law of a country other than Northern Ireland; and

(b) the representative is not entitled to exercise the authority in that respect (or those respects) under the law of that other country.

(4) This sub-paragraph applies if—

(a) the law applicable to the authority in one or more respects is, as a result of this Part, the law of Northern Ireland; and

(b) the representative is not entitled to exercise the authority in that respect (or those respects) under that law.

(5) This paragraph does not apply if the third party knew or ought to have known that the applicable law was—

(a) in a case within sub-paragraph (3), the law of the other country;

(b) in a case within sub-paragraph (4), the law of Northern Ireland.