Can States Require ICE Agents to Remove Masks? The Constitutional Question

Editor’s note: The earlier version of this piece described a specific New York statute (S.9193A/A.10172), a Department of Justice lawsuit, and a temporary restraining order by Judge Dale E. Ho on August 4, 2024, and it included purported quotes from that order. We could not verify those claims, and the quotes were not drawn from an authenticated court document. This updated article therefore treats the scenario as a hypothetical and removes any invented dates, docket details, and verbatim “quotations.”

Officials in some jurisdictions have discussed rules that would require clearer officer identification and limit face coverings during defined law enforcement activity. Supporters frame these measures as transparency and anti-impersonation safeguards. Critics argue they can endanger officers and interfere with sensitive operations.

The headlines often make it sound like a narrow fight about masks. Constitutionally, it turns on an older question the Supreme Court has been answering for more than two centuries: when a state tries to control the how of federal law enforcement, who decides?

What the proposal would do

To avoid overstating facts that may not exist in the real legislative record, this explainer uses a simplified, representative version of the policy debate. In general, proposals aimed at law enforcement tend to do two things during defined enforcement activity:

• Limit or restrict face coverings, usually with enumerated exceptions.
• Require visible identification, often described as a badge number, agency name, or credentials displayed to the public.

These bills also tend to include exceptions meant to reflect operational reality, for example:

• Undercover or sensitive activity where disclosure could compromise an investigation.
• Protective equipment used for health or safety reasons.
• Exigent conditions where compliance is not feasible in the moment.

Supporters pitch these policies as accountability measures. Opponents argue they increase the risk of doxxing, retaliation, or interference during arrests.

Those are real policy arguments, but they do not decide the constitutional issue. The threshold question is simpler: does a state have power to impose these conditions on federal officers at all, and in what circumstances?

If the U.S. sued

Here is what a legal challenge would likely look like if the federal government believed a state identification or mask rule was being applied to federal officers performing federal duties.

The United States would typically argue that the state measure is unconstitutional as applied to federal officers because it interferes with federal operations and imposes state penalties or conditions on how federal law is executed.

In that posture, a federal court might consider emergency relief such as a temporary restraining order (a short-term order, often issued on an accelerated record) or a preliminary injunction (longer-lasting relief granted only if the plaintiff satisfies a multi-factor test, including likelihood of success and irreparable harm). Whether relief is granted would depend on the text of the law, how it is being enforced, and what the evidence shows about operational impact on federal functions.

Because the earlier version of this article referenced an unverified TRO and unverified quotations, this version does not attribute any statements to any judge or any court order.

Supremacy basics

States do not have a general, free-standing power to direct how the federal government carries out its work. But that principle has limits and qualifiers. Federal officers and employees are typically subject to neutral, generally applicable state laws that do not discriminate against the federal government and do not meaningfully regulate federal functions.

This federal-state boundary shows up in a long line of cases often summarized as “states cannot regulate the federal government,” with the classic early statement in McCulloch v. Maryland

A useful way to think about the doctrine is the difference between (1) ordinary conduct rules that apply to everyone and (2) state-imposed preconditions on performing federal duties. Federal employees generally must obey ordinary traffic and safety rules when driving. But a state usually cannot require a special state license, permit, or approval as a condition of doing federal work. That distinction is central to Johnson v. Maryland (1920), where the Court rejected Maryland’s attempt to require a federal postal driver to obtain a state driver’s license to perform his job.

Cases often cited in this area include:

• Johnson v. Maryland (1920), rejecting a state licensing requirement that operated as a precondition for federal duties.
• Leslie Miller, Inc. v. Arkansas (1956), holding that a state licensing scheme could not be used to control who may perform federal contract work when federal law already set the standards.
• Hancock v. Train (1976), ruling that states could not require federal facilities to obtain certain permits absent clear congressional authorization.

The constitutional red flag appears when a state law is aimed at federal officials as such, or when it effectively tells federal agents what tactics they must use to do federal work. Mask limits and visible identification mandates can sound modest, but the concern is similar. If a state can dictate the conditions under which federal agents may conduct arrests or execute warrants, then the state is setting the terms of federal enforcement inside its borders.

How courts analyze it

Courts usually translate the big constitutional idea into a few practical questions:

• Is the rule neutral and generally applicable? Or does it single out federal officers, federal agencies, or federal tasks for special treatment.
• Does it regulate federal operations in practice? A rule can be invalid even if it is framed as “public safety” if it functions as a condition on how federal duties are carried out.
• Does it conflict with federal law or create an obstacle? Even without an explicit contradiction, a state rule can be preempted if it materially frustrates federal methods or objectives.

These concepts are often discussed under intergovernmental immunity and conflict or obstacle preemption. The labels vary by case, but the core inquiry is consistent: is the state trying to manage the federal government’s work, or merely applying a general rule of conduct to everyone.

Immigration and federal power

Immigration is an area where federal authority is especially prominent because it sits at the intersection of Congress’s naturalization power, foreign affairs, and a comprehensive federal statutory scheme. That mix is also why immigration disputes so often become preemption disputes.

But it helps to separate three ideas that often get blurred together:

• Federal primacy in immigration regulation and enforcement. This is the core point in cases like Arizona v. United States (2012), which invalidated several state provisions that conflicted with federal immigration priorities and methods.
• State police powers that incidentally affect immigrants. States can still legislate on employment, licensing, benefits, and public safety in many ways, even though those rules affect noncitizens too, so long as they do not conflict with federal law or intrude into a federally occupied field.
• Anti-commandeering. Even when federal authority is primary, states generally cannot be forced to use state personnel or resources to carry out federal immigration enforcement. States can decline to help. That is different from regulating federal agents.

So when this explainer says states cannot put a brake on federal enforcement, read that narrowly. States generally cannot directly regulate, penalize, or condition the performance of federal enforcement activity by federal officers. Noncooperation policies raise a different set of constitutional questions.

Why ID rules matter

This is where the debate gets more subtle. A state does not have to say “federal agency X cannot make arrests here” to trigger a supremacy problem. A state can instead regulate how officers must present themselves while doing certain enforcement activity.

Courts can still view “how” rules as significant if they function as an added condition on federal power. Judges tend to scrutinize state laws that, as applied to federal officers:

• Add conditions before federal authority can be exercised
• Create state penalties tied to the manner of executing federal duties
• Materially increase operational risks such as delays, exposure of tactics, or heightened interference

Requiring visible identification can be framed as a public-facing accountability measure. The federal government, by contrast, will often argue that identification protocols and protective measures are part of federal operational control, including officer safety and the integrity of ongoing investigations. Federal agencies also typically have internal policies and procedures for identification and operational security, even if the public sees them unevenly in practice.

Accountability and safety

Constitutional law has an uncomfortable habit. It separates “is this a good idea?” from “which level of government has the power to do it?”

A state’s argument, in broad terms, is that mask limits and visible ID requirements deter impersonators and make it easier to report misconduct. The federal government’s argument is that face coverings can protect officers from being identified and targeted, and that the choice of tactics belongs primarily to the federal government when it is carrying out federal responsibilities.

The Supremacy Clause does not pick a side in the policy dispute. It tends to determine the decision-maker. If the rule is best understood as managing federal enforcement methods, the state is usually not the decision-maker.

Edge cases

Not every mask or identification rule creates the same supremacy problem. A few recurring edge cases tend to matter in litigation:

• Truly general rules. A broadly applicable rule that applies to everyone in a limited setting, for example a no-mask rule at the public counter of a state office, may look more like ordinary regulation than an attempt to manage federal operations.
• How the law is enforced. A civil fine, a criminal charge, or an attempt to impose a state-law exclusionary remedy, such as arguing evidence should be suppressed, can raise different preemption and immunity questions. Those differences can also affect whether the dispute is framed as enforcement against an individual officer, an agency practice, or an indirect consequence imposed later in court.
• How exceptions work in practice. A statute with nominal carve-outs can still interfere if the exceptions are narrow, hard to invoke in real time, or second-guessed after the fact.

These details do not erase federal supremacy, but they can change how a court characterizes the law and how burdensome it is on federal work.

When state law can apply

Sometimes it can. States routinely enforce neutral laws that do not single out the federal government and do not materially interfere with federal functions. Depending on the context, that can include generally applicable criminal laws and ordinary rules of conduct. For example, federal officers are not exempt from generally applicable prohibitions on assault, theft, or trespass just because they are federal employees. The harder question is whether the conduct is part of lawful federal duties, and whether the state is using its law to second-guess federal operations.

But when a state law is written to target federal officers, or when it effectively conditions their work on compliance with a state-specific operational rule, courts are much more likely to see unconstitutional interference under intergovernmental immunity, conflict preemption, or obstacle preemption.

That targeting question matters in any “unmasking” style dispute because these laws, in practice, can collide with federal enforcement activity that is already politically contested. If a court concludes the statute operates as a state-imposed operational rule on federal enforcement, that pushes the case toward federal supremacy.

Can states ban masks for ICE?

As a general constitutional matter, states have limited ability to impose operational rules on federal officers, especially where those rules are directed at federal enforcement activity.

The outcome in any real case would still turn on details, including how narrowly the law is written, how its exceptions function in practice, what penalties or remedies it creates, and whether it operates as a meaningful obstacle to federal enforcement. The baseline presumption of American federalism remains: states generally cannot direct federal officers in the performance of their federal duties, particularly through state-specific conditions that function as control over federal operations.

What happens next

• Legislative detail matters. If a state enacts an “unmasking” bill, the text, definitions, exceptions, and enforcement mechanisms often determine whether it is viewed as neutral regulation or operational control.
• Litigation posture matters. If the federal government challenges a state law, early motions may seek emergency relief, but final outcomes typically depend on a developed record.
• Congress can act. If lawmakers want uniform national rules on identification or face coverings for federal operations, Congress has the clearest authority to write them.

The larger lesson is about structure, not slogans. Federalism is about which government gets to make the rule when power overlaps. And when the dispute is over federal officers doing federal jobs, federal supremacy often plays a central role.