Part 1: Call-in for national security Chapter 1: Call-in power
Sections 1 and 2 collectively provide for the "call-in power". The call-in power may be used by the Secretary of State in relation to a trigger event which has given rise to, or may give rise to, a risk to national security (see Chapter 2 for details on trigger events). Sections 3 and 4 provide for the publication of a statement which sets out how the Secretary of State expects to exercise the call-in power and the parliamentary procedure for the statement. The Secretary of State must publish the statement before giving a call-in notice and must have regard to it when exercising the call-in power.
	The Secretary of State will be able to call in any trigger event that raises national security concerns, including those which have not been notified to him or her. He or she will be able to do this when the trigger event is in contemplation or progress, or within a prescribed period of up to 5 years after a trigger event has taken place (but a call-in notice may not be given after the end of the period of 6 months beginning with the day on which the Secretary of State became aware of the trigger event where the trigger event has already occurred).