Such an Arrangment might involve a change in work hours(for example,
to begin and end work later), working from home, changes to the number of hours or days an employee works, or sharing a job with another employee.
However, because of the way it has developed over the years,
the Common Travel Area Arrangment is not as formalised as other similar
Arrangments(such as the Schengen Area), and so the exact rules can be quite complex for some third country nationals.