Tiers 2 and 5 are the main immigration routes for skilled and temporary non-EEA workers. Paragraph 323AA of the Immigration Rules defines circumstances in which a Tier 2 or 5 migrant’s leave may be curtailed. This includes absences from work without pay for four weeks or more during any calendar year. There is no specified exemption for strike or industrial action. The Home Office does, however, consider the circumstances before deciding whether to take curtailment action.