Owners of unreinforced masonry buildings in Portland filed a federal lawsuit against the city Wednesday, Dec. 19, to repeal a requirement that they post signs warning of danger during major earthquakes.

The City Council approved the requirement on Oct. 10. It says owners of some but not all unreinforced masonry buildings must post signs that read, "This Building is an Unreinforced Masonry Building. Unreinforced Masonry Buildings may be unsafe in an event of a Major Earthquake."