(1) The state of disaster:
(a) begins as soon as it is declared; and
(b) continues until the end of the 7th day after it is declared unless, before that time, the declaration is:
(i) revoked; or
(ii) extended under subsection (2).
(2) The Administrator may extend the declaration for the periods, not exceeding 14 days in each case, as he or she considers necessary.