Part 1: Public Protection Requirements Investigations and enforcement: sections 12 to 16 Section 15: Variation or withdrawal of notices
As set out in this section, the Security Industry Authority may vary or withdraw an issued compliance notice or restriction notice by giving notice to the person who received the original notice.
	Whilst a notice cannot be made more onerous (e.g. it cannot add a new prohibition to a restriction notice), the period for which a restriction notice has effect can be extended for up to 3 months at a time but:
it must be extended before the current period ends, and
the Security Industry Authority must have reasonable grounds to believe that the variation is necessary to reduce the risk of physical harm being caused to people if a terrorist attack occurred at the premises or event or in their immediate vicinity (i.e. the same condition as for imposing the restriction notice originally).
	Before extending the period for which a restriction notice has effect, the Security Industry Authority must:
notify the person of their intention to vary the notice in this way, and
give the person the opportunity to make representations.