On October 10, Portland City Council voted to require plaques on unreinforced masonry buildings and notify tenants. Building owner must notify existing tenants that the building is an unreinforced masonry building, and unreinforced masonry buildings may be unsafe in the event of a major earthquake.

For more info, please read the original article by Portland Bureau of Emergency Management:
https://www.portlandoregon.gov/pbem/66306