Section 12

Every will made by a man or woman shall be revoked by his or her marriage, except a will made in exercise of a power of appointment, when the property thereby appointed would not in default of such appointment pass to his or her heir, executor or administrator or the person entitled in case of his or her intestacy:

Provided that a will expressed to be made in contemplation of a marriage shall not be revoked by the solemnization of the marriage contemplated; and this proviso shall apply notwithstanding that the marriage contemplated may be the first, second or subsequent marriage of a person lawfully practising polygamy.