A federal judge issued a temporary restraining order on Thursday preventing Portland from enforcing its controversial unreinforced masonry building earthquake posting requirement.

Oregon U.S. District Court Judge John Acosta issued the injunction as the City Council is preparing to revisit the requirement, which it adopted last October. Owners of commercial URM buildings were required to post signs they could be hazardous in major earthquakes on March 1. But, at the end of an hour-long hearing with city attorneys and lawyers representing URM building owners, Acosta said Portland officials cannot enforce the requirement until May 1.