The Obama Administration is officially scrapping a post 9/11 requirement for immigrant men from predominantly Muslim countries to register with the federal government.

Via AP

The U.S. hasn’t used the program since 2011, but a top immigration adviser to President-elect Donald Trump has spoken of renewing it.

The decision to end the National Security Entry-Exit Registration System, or NSEERs, comes amid growing international terror fears and Trump’s suggestions that he could ban Muslim immigrants from the United States. After a truck attack killed 12 in a Christmas market in Berlin this week, Trump told reporters, “You know my plans.”

The program’s elimination could make it more complicated for Trump’s administration to launch its own registration system for Muslims.

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The registration system started about a year after the Sept. 11 terrorist attacks, requiring men and boys from a variety of mostly Middle Eastern countries to register with the federal government upon their arrival in the United States. Such people already in the country had to register with immigration authorities inside the U.S.

Registration, which also applied to immigrants from North Korea, included fingerprints and photographs. People also were required to notify the government if they changed addresses.