(3) Where, by a
settlement, there is a disposition for a purpose and the disposition would,
but for this Act, infringe the rule against perpetual trusts, the disposition
shall be treated, until such time (if any) as it becomes certain that the
disposition must infringe that rule, as if it did not infringe that rule, and
its so becoming certain does not affect the validity of any thing previously
done in relation to the disposition.
(4) This section does not apply to a
disposition for a purpose which is charitable.
