The Northern Marianas Government now requires foreigners in the country for more than three months to register and carry ID cards.
The Department of Labour regulations came into force at the beginning of this month.
Every foreigner who remains in the CNMI longer than 90 days has to register and comply with an ID system.
Failure to do so means a jail term of up to 90 days, or a fine of up to five hundred US dollars, or both.
Employers wanting to bring in foreign workers will be required to submit a workforce plan that includes a timetable for replacing these employees with qualified locals.