(1)  A declaration under this Division takes effect –

(a) on the day on which notice of the declaration is published in the Gazette ; or

(b) such later date as is specified in the notice so published.

(2)  A declaration under this Division ceases to have effect –

(a) on the date specified in the notice so published; or

(b) on the expiry of the period specified in the notice so published; or

(c) if no such date or period is specified in the notice, on the revocation of the notice.