Parts 1 and 2 deal with "category 1" and "category 2" territories respectively. While it is not mentioned in the Act, category 1 territories are all other member states of the European Union and Part 1 of the Act is the United Kingdom's implementation of the European Arrest Warrant framework decision. Part 2 of the Act is concerned with extradition to all other countries which have an extradition treaty with the United Kingdom.
Part 3 deals with issuing European Arrest Warrants and extradition warrants.
Part 4 regulates powers of arrest, search and seizure regarding individuals subject to European Arrest Warrants and extradition warrants.