Scope and purpose
The challenged provisions concerned registration documents, unauthorized work, state arrests and status checks. The opinion distinguishes state enforcement measures from federal statutory authority and discretion; it is not an adjudication of an individual benefit application.
Related rules and practical context
The decision provides federal-state context for residents of California and Florida as well as other states. It does not decide personal immigration status or prohibit every form of state cooperation. Later legislation and judicial authority may affect a particular issue.