President Donald Trump’s travel ban, which expires Sunday, will be replaced by a series of targeted measures meant to deter the entry of terrorists to the United States.

The New York Times reports that the new restrictions could take effect as soon as the travel ban expires on its own terms.

Officials familiar with the plan told The NYT that the Department of Homeland Security has identified at least half a dozen countries that fail to comply with American security measures ensuring that terrorists cannot gain entry to the U.S. 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 in question 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.

Trump has not yet approved the plan. It is not yet clear if these requirements will also be applied against refugees, though the ban on refugee resettlement is not set to expire for another 33 days. Therefore, it is likely a separate proposal is currently being formulated for the refugee program.

The president’s executive order requires the secretaries of state and homeland security and the director of national intelligence to produce reports identifying the additional security measures countries named in the order must implement in order to resume regular travel to the U.S. It appears this proposal is the result of that process.

Follow Kevin on Twitter. Send tips to [email protected].

Copyright 2017 Daily Caller News Foundation