 Part 6 of the act brings clarity to the classifying guns under the Firearms Act 1968, based on recommendations from the Law Commission.Another change relates to police bail, which can now only be authorised by an officer of inspector rank or higher (so normally a suspect will now be released without bail if not charged), and extending this period is now only possible once by authorisation of a superintendent officer, or again by a magistrates' court; previously it was possible for police to effectively restrain a person indefinitely by extending the bail period every 28 days.Controversially this has led police forces to adopt an alternative method of 'releasing under investigation' with no time limits or conditions, requiring a suspect to respond by post.