When a Key Function holder cannot exercise their function/s due to extenuating circumstances, a person not holding the certificate approval but having the necessary competencies may exercise such function/s on a temporary basis. In any such case, the Authority shall be notified forthwith and in no case later than twenty-four (24) hours after such person is vested with the exercise of the key function/s. Such a temporary exercise may not exceed one (1) calendar month, but may be renewed with the prior written approval of the Authority.