Part 6: Bulk warrants Chapter 2: Bulk acquisition warrants Section 166: Approval of major modifications made in urgent cases
This section sets out the process for the approval of a major modification to a bulk acquisition warrant, which has been made urgently by the Secretary of State without the approval of a Judicial Commissioner.
	The Secretary of State must inform a Judicial Commissioner that the modification has been made.
	The Judicial Commissioner has three working days from the date of the modification in which to decide whether to approve the decision to modify the warrant, and to notify the Secretary of State of that decision.
	If the Judicial Commissioner refuses to approve the decision to make the modification, subsection (4) makes clear that the warrant has effect as if the modification had not been made, and anything done as a result of that modification must stop as soon as possible.
	In an urgent case where a Judicial Commissioner refuses to approve the decision to make a major modification, the Secretary of State may not refer the case to the Investigatory Powers Commissioner for a review.