18(1)Subject to subsection (2), unless an alteration that is made in a will after the will has been made is made in accordance with the provisions of this Act governing making of a will, the alteration has no effect except to invalidate words or meanings that it renders no longer apparent.

18(2)An alteration that is made in a will after the will has been made is validly made when the signature of the testator and subscription of witnesses to the signature of the testator to the alteration, or, in the case of a will that was made under section 5 or section 6, the signature of the testator, are or is made