White House staff will be banned from carrying personal cell phones in the West Wing starting next week, Politico reported Wednesday.

The ban, which was first reported last week, will officially go into effect on Jan. 16. From that point forward, staffers will not be allowed to have personal cell phones in the White House from 6 a.m. to 8 p.m., Monday through Friday.

Those who violate the memo will be subject to disciplinary action, Politico reported, citing the memo from chief of staff John Kelly John Francis KellyMORE

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Credentialed reporters are allowed to carry personal cell phones in the White House in areas they are already allowed to access, but must otherwise be accompanied by White House staff, Politico reported.

President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE has in the past complained about leaks coming from inside the White House, an issue which has at times plagued his administration.

Last week, a new book, “Fire and Fury: Inside the Trump White House,” was released and featured explosive interviews with former chief strategist Stephen Bannon and others. Wolff said he was given access to the West Wing for the book.

Some aides have reportedly expressed concerns about how the ban will affect them if they need to contact family members during the day.