U.S. Citizenship and Immigration Services issued guidance late Thursday night that would allow their officials to demand extra, detailed information — including worker contracts and itineraries — from companies who send H1-B workers to third-party worksites.

Why it matters: While this isn't a policy change, the memo specifically targets outsourcing firms, which account for the most H-1B labor filings, for potentially tougher scrutiny. These firms have been the focus of Homeland Security memos, proposed policy changes, and congressional bills introduced over the past year by the Trump administration, as they are often portrayed as taking advantage of the H-1B program at the expense of American workers.