(1) This section applies if, in a proceeding, a question arises about whether, on a particular day or during a particular period, the principal for an enduring power of attorney had impaired decision-making capacity, whether generally or in relation to a particular matter.
(2) A certificate by a doctor stating
that the principal had, or did not have, impaired decision-making capacity
either generally or in relation to a particular matter on the day or during
the period is evidence of that fact.