occupied the field
Definitions from Case Law · United States Supreme Court
Definitions from Case Law
From 270 U.S. 87 - Oregon-Washington Railroad & Navigation Co. v. Washington · 1926Most cited · 38 citing opinions
the state may exercise its police power until Congress has by affirmative legislation occupied the field by regulating interstate commerce and so necessarily has excluded state action
How often courts cite the case defining “occupied the field”
Court decisions citing the opinion that defined “occupied the field” — 124 in all, by decade. Counts are citations to the defining case as a whole, not verified uses of the term. The dip in the most recent years is a data-coverage gap, not a real trend — our corpus holds fewer opinions from the latest years.