(1)  A power of attorney is taken to be valid notwithstanding that the attorney is expressed to be appointed as a member of a specified class of persons.

(2)  Where a person purporting to act as attorney of the donor under any such power of attorney states in writing that he or she is authorised to act as a member of the specified class –

(a) any other person dealing with the purported attorney may rely on the statement as sufficient authority for him or her to act as such at the relevant time under the power of attorney; and

(b) the statement is taken to be evidence that the purported attorney was, at the relevant time, authorised to act as such under the power of attorney.