Part 1: Call-in for national security Chapter 1: Call-in power Section 1: Call-in notice for national security purposes
Section 1 enables the Secretary of State to give a call-in notice in relation to a trigger event (see Chapter 2) which the Secretary of State reasonably suspects has taken place or is in progress or contemplation, and which they reasonably suspect has given rise to or may give rise to a risk to national security.
	Subsection (1) provides for the test which much be met for the Secretary of State to issue a call-in notice.
	Subsection (2) specifies that, for the purposes of the Act, the effect of section 13(1) must be disregarded when considering whether a trigger event has taken place or will take place.
	Subsection (4) details the persons who must be given copies of the call-in notice. These include the acquirer and, if the acquisition relates to an entity, the entity itself. In addition, the Secretary of State may consider it appropriate to give a call-in notice to, for example, the seller or sellers, a significantly affected third party, or a relevant regulator.
	Subsections (6) to (8) provide that the Secretary of State must publish and have regard to the statement provided for by section 3 before exercising the call-in power, but this power is not limited by anything contained in the statement.