10. No person shall, by virtue of the last preceding regulation, be entitled to have his case considered for compensation for any loss suffered by him by reason of his not being re-employed as therein mentioned unless within a period of two months after the date on which he ceased to be engaged in war service he gives notice in writing that he is available for employment to the authority or body by whom he was employed before becoming engaged in war service or, if that authority or body ceases to exist by virtue of the Act, to the compensating authority in relation to officers of the first mentioned authority or body: