Travellers heading to the Republic of Ireland will now have to quarantine for 10 days on arrival if they haven't had both of their coronavirus vaccines.
But what about everyone else?
Here at BelfastLive we've had a look at the different coronavirus rules for travellers heading between Northern Ireland, The Republic of Ireland and Great Britain.
Travelling into Dublin from Northern Ireland
Transport Minister Eamon Ryan announced on Monday that travellers entering the Republic of Ireland from GB and NI would be required to quarantine for 10 days and take an additional PCR test.
The 10-day quarantine period will only apply to travellers who have not been vaccinated or have been partially vaccinated.
It is not clear currently if the changes will be for travellers stopping overnight or if it would apply to anyone landing in Dublin.
Mr Ryan hopes the quarantine period will only be in place until July 19. The changes will have to be ratified by the Cabinet first.
Travelling to Northern Ireland from the Common Travel Area
Anyone travelling to Northern Ireland from the Republic of Ireland, Great Britain, the Isle of Man, or the Channel Islands should take a coronavirus lateral flow test before setting off on their journey.
They should then only travel if the test comes back negative.
Anyone stopping overnight is then asked to take another lateral flow test on the second day and the eighth day of their stays.
Passengers should not travel to Northern Ireland if they have coronavirus symptoms.
Returning to Northern Ireland from abroad
The rules on returning to Northern Ireland from countries abroad depend on whether they are on the green, amber or red list. Anyone travelling from an amber list country for example will have to self-isolate for 10 days after landing.
Popular destinations such as Portugal, Spain, France, Italy and Greece, are currently not on the NI green list. However, the list will be reviewed every three weeks.
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