A Judicial Commissioner may refuse to approve any warrant that they believe does not meet the test set out by Judicial Review principles. Judicial Review principles are well established, tested and have been applied by the courts for a long time. The Judicial Commissioner will consider whether the Secretary of State’s decision was reasonable, lawful, made fairly, and whether it complies with the European Convention on Human Rights. The Judicial Commissioner’s consideration will include a review of the Secretary of State’s conclusions on necessity and proportionality. The Judicial Commissioner will have final say on whether a warrant can be issued.