In a 5-4 ruling today, the U.S. Supreme Court decided not to block parts of a Texas abortion law.

The law took effect on Oct. 31, after the 5th U.S. Circuit Court of Appeals overturned a temporary injunction put in place by a lower federal court. It requires doctors who provide abortions to obtain admitting privileges at nearby hospitals and provides strict oversight for the way abortion-inducing drugs are administered. Planned Parenthood joined several other abortion providers in a lawsuit in September, claiming the law placed an undue burden on women and would force nearly a third of the state’s abortion facilities to close.

A lawsuit over the law’s constitutionality remains on appeal in a federal appeals court. A three-judge panel will hear arguments on that case in January.