The US Senate on Tuesday approved a House-passed resolution directing President Donald Trump to withdraw US armed forces from hostilities against Iran, The Hill reports.

The Senate voted 50 to 48 to approve the resolution, which had passed the House of Representatives 215-208 earlier this month.

The measure came straight to the Senate floor Tuesday for an up-or-down vote on final passage. It does not need Trump’s signature because it is a concurrent resolution.

The resolution does not have the force of law, even though it’s been approved by both chambers.

Four Republicans voted for the measure: Sens. Rand Paul (Ky.), Susan Collins (Maine), Lisa Murkowski (Alaska) and Bill Cassidy (La.).

The same four GOP senators voted last week to discharge a similar resolution from the Senate Foreign Relations Committee, but it failed to advance because of Democratic attendance issues.

Centrist Sen. John Fetterman (Pa.) was the only Democrat to join the majority of Republicans in voting against the measure.

In recent months, the US has been actively discussing the issue of whether the president has the right to conduct military operations against another country for a long time without the approval of Congress. The Trump administration is proceeding from the position that there are no restrictions in this case. At the same time, many congress members believe that in such cases a “green light” is required not only from the executive branch, but also from the legislative branch.

According to the 1973 War Powers Act, the US president must stop military operations after 60 days unless Congress votes in favor of declaring war or passes a law authorizing the use of force.

The law allows for a one-time extension of this period for 30 days, but only if the president confirms in writing to Congress that additional time is needed to ensure the safe withdrawal of American troops.

The US Congress has not yet approved the use of military force against Iran, and the White House has not publicly indicated that it plans to obtain such authorization.