Book excerpt: The Government has struck a reasonable balance in the way it is planning to exercise its right to opt-out of pre-Lisbon Treaty EU policing and criminal justice measures, but the way it has engaged Parliament in the decision-making process has been badly handled and 'cavalier'. The Government left the Commons select committees far too little time to assess the reasons for their decisions on EU justice opt-ins, and did not provide the full impact assessment which was needed. The Committee agrees with the Government's plans to seek to opt back into seven of the sixteen measures, and not to opt into a number of others. The Committee also raises questions about the Government's intention not to opt back into two specific instruments, the Probation Measures Framework Decision and the Framework Decision on the settlement of conflicts of jurisdiction. The Committee also calls on the Government to provide an assessment of the effect of the extension of the jurisdiction of the Court of Justice of the European Union over the measures covered by the opt-out. The Committee also agrees with the Government's proposal to seek to rejoin decisions on data protection in policing and criminal justice, and on a data protection secretariat, but says that the arguments are more finely balanced in relation to the Framework Decision on settlement of conflicts of jurisdiction