President Donald Trump’s travel ban, a signature domestic policy accomplishment of his nascent presidency, will expire late Sunday.

The Department of Justice advised Friday that the ban will expire at 11:59 pm EST Sunday night. A separate provision of the order suspending refugee resettlement for 120 days will expire later this year.

The order, released in its first form in late January, inspired the resignation of acting Attorney General Sally Yates and a swell of protests at airports across the country. A coalition of Washington lawyers, Democratic attorneys general, and civil rights group litigated intensely against the ban for months, before the U.S. Supreme Court allowed a tailored version to take effect in late June.

It’s not yet clear what additional security measures the administration might promulgate as the travel ban expires. Officials familiar with one proposal say the Department of Homeland Security has identified at least half a dozen countries that fail to comply with U.S. security measures regarding transnational travel. It is not clear if those countries include the six nations named in the president’s travel ban — Iran, Libya, Syria, Somalia, Sudan and Yemen.

The measures under consideration appear to pertain to the oversight of visa processing. U.S. officials fear that vetting procedures attending visa issuance in a number of countries with high instances of terror are not sufficiently vigorous. These officials warned a number of foreign governments that they will severely restrict or suspend travel to the U.S. unless they fully comply with the security regime.

The restrictions are likely to vary from country to country dependent on their cooperation with American standards.

As of this writing, the Supreme Court is scheduled to hear arguments regarding the legality of the travel ban on Oct. 10. The justices may soon dismiss the case, as the expiration of the travel ban may render the controversy moot.

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