16.  Every application for a grant in respect of the estate of a person who has at any time served in the capacity to which the Navy and Marines (Wills) Act 1865(1) applies shall be supported by a certificate of the Inspector of Seamen's Wills as to the existence of any will in his custody :

Provided that no such certificate shall be required where—

(a)the application relates to a will made after the deceased had ceased to serve in such capacity as aforesaid which revokes all previous wills made by him, or

(b)the deceased was at the date of his death in receipt of a pension in respect of his service.