Senators and their staffs will be subject to new access restrictions and decorum practices in and around the Senate chamber starting Thursday morning, thanks to the imminent impeachment trial of President Donald Trump.

Access to the Senate wing will be more limited than usual as of 10:30 a.m. Thursday.

By unanimous consent, the Senate adopted the first round of impeachment procedures late Wednesday.

Those included an invitation for House managers to present the articles of impeachment Thursday and notify Supreme Court Chief Justice John G. Roberts Jr., who will preside over the trial. Measures also call for senators to set up an escort committee for Roberts, take an oath as jurors Thursday afternoon and have a photograph of them taking that oath.

In a “Dear Colleague” letter Wednesday, signed by Majority Leader Mitch McConnell and Minority Leader Charles E. Schumer, senators were advised of limits on guest and staff access to the Capitol’s Senate wing.