This Practice Note looks at the ‘grounds for refusal’ of applications for entry clearance or permission to which the Immigration Rules, Part 9 applies, and for the cancellation of in-force entry clearance or permission. It does not cover such grounds which relate to a person's previous personal conduct (whether they have committed criminal offences or there are other aspects of personal conduct which are not deemed conducive to the public good), or grounds related to false representations etc and deception. The Practice Note includes examination of the grounds for refusal (which apply to overseas and on-entry applications only) which relate to previous breaches of immigration law and result in a mandatory re-entry ban. The length of the re-entry ban is decided by a sliding scale based on the seriousness of the breach.