(1) This section applies if:
(a) an act is done for 2 or more reasons; and
(b) one of the reasons (whether or not it is the dominant or a substantial reason) is:
(i) the age of a person; or
(ii) a characteristic that appertains generally to persons of the age of a person; or
(iii) a characteristic that is generally imputed to persons of the age of a person.
(2) For the purposes of this Act, the act referred to in paragraph (1)(a) is taken to be done because of the age of the person.