30 days is quite sufficient I think, but upon further review it should be an EMS message of some type declaring that anyone that is in the US illegally has 48 hours to report to a deportation center (local, regional and international airfields) manned by National Guard Troops.
They will then be biometrically entered into a database, placed onboard transport aircraft and flown back to every country they came from. If the country threatens a hostile response, there are plenty of uninhabited islands that could be turned into vacation destinations when the alternative is an island set aside for a max prison.
But hey, that’s just me…
Sounds good to me!