Lobbyists hoping to work for President-elect Donald J. Trump will have to terminate their lobbyist registrations to be vetted for high-level positions, according to CNN.

Additionally, as an agreement to work with the next administration, officials leaving their future positions will be banned from lobbying for five years. Republican National Committee spokesman Sean Spicer says the goal of the ban is to make sure “people aren’t using the government to enrich themselves and using their service in government to do that.”

Trump’s transition team told CNN this will help fulfill Trump’s campaign promise to “drain the swamp” in Washington.