(1)

A security direction comes into force at the time specified in the direction.

(2)

However:

(a) if:
(i) there is no time specified; or
(ii) the specified time is before the time when the direction is given;
the direction comes into force 24 hours after it is given; or
(b) if the specified time is later than the beginning of the seventh day after the direction is given, the direction comes into force at the start of that day.

(3)

A security direction remains in force until either of the following occurs:

(a) the direction is revoked in writing by the Secretary;
(b) the direction has been in force for a continuous period of 3 months.