(1) Without limiting section 15C, the following wills shall be taken to have been properly made:
(a) a will made on board any vessel or aircraft where the making of the will was in accordance with the internal law in force in the country or place with which, having regard to its registration (if any) and other relevant circumstances, the vessel or aircraft may be taken to have been most closely connected;
(b) a will, so far as it disposes of immovable property, where the will was made in accordance with the internal law in force in the country or place where the property is situated;
(c) a will, so far as it revokes—
(i) a will; or
(ii) a provision of a will;
that under this Act would be taken to have been properly made, if the later will was made in accordance with any law by reference to which the revoked will or the will containing the revoked provision, as the case may be, would be so taken to have been properly made.
(2) A will, so far as it exercises a power of appointment, shall not be taken to have been improperly made by reason only that it was not made in accordance with any formal requirements contained in the instrument creating the power.