18 USC 1752: Restricted Buildings, Protests, and Penalties

18 U.S.C. 1752 is the federal statute that makes it a crime to knowingly enter or remain in a restricted building or grounds, disrupt government business there, block access, commit violence inside the perimeter, or fly a drone into or above it. A basic violation is a Class A misdemeanor carrying up to one year in prison and a $100,000 fine. If the person used or carried a deadly weapon or firearm, or the offense caused significant bodily injury, the maximum jumps to ten years and a $250,000 fine.¹

What the Statute Prohibits

Section 1752 lists five distinct offenses. Each one requires that the person acted “knowingly,” but the additional intent required varies.

Unauthorized entry or remaining. The simplest violation, and the one prosecutors charge most often. The government has to prove you entered or stayed in a restricted area and lacked authorization. No intent to cause harm or disruption is needed.

Disruptive conduct. Disorderly behavior in or near a restricted area is only criminal here if the person specifically intended to impede government business and the conduct actually did impede it. Noise alone near the White House is not enough.

Blocking access. Obstructing entry to or exit from a restricted building or grounds, again with intent to disrupt government business. Human chains across an entrance and barricaded doorways are the paradigm cases.

Physical violence. Any act of violence against a person or property inside the perimeter, under subsection (a)(4). This one does not require intent to disrupt government functions. The violence itself is the offense — assaults, broken fencing, smashed windows all qualify.

Operating a drone. Knowingly and willfully flying an unmanned aircraft system into or above a restricted area carries the same penalty structure as the other offenses.¹

Where the Law Applies

The statute defines “restricted buildings or grounds” as any posted, cordoned-off, or otherwise restricted area falling into one of three categories.

The White House and Vice President’s residence, along with their surrounding perimeters, are permanently covered.
Any building or grounds where the President or another person protected by the Secret Service “is or will be temporarily visiting.” An area can become restricted before the protectee arrives.
Any building or grounds restricted in connection with an event the Secretary of Homeland Security has designated as a National Special Security Event.

The second category is broader than it looks, because Secret Service protection extends beyond the sitting President and Vice President to former presidents, presidential and vice presidential candidates within 120 days of a general election, visiting foreign heads of state, and others designated by executive order.² Whenever one of these individuals visits a location, the surrounding area can be brought within the statute.¹ Presidential inaugurations, national political conventions, major international summits, and certain large sporting events have received the National Special Security Event designation.³

A restricted zone doesn’t have to be permanent. A sidewalk that was public yesterday can be a federal restricted zone today if a protectee is scheduled to visit a nearby building. Temporary cordons, posted signs, and law enforcement instructions all count as notice.

Penalties

The penalty structure has two tiers, and the gap between them is large.

A standard violation is a Class A misdemeanor: up to one year in prison and a fine of up to $100,000.¹⁴

The offense becomes a Class C felony carrying up to ten years and a fine of up to $250,000 if either of two aggravating factors is present. The first is that the person used or carried a deadly or dangerous weapon or firearm during the offense; prosecutors don’t need to show the weapon was used against anyone, only that it was carried. The second is that the offense caused “significant bodily injury,” defined by cross-reference as an injury involving a risk of death, significant physical pain, protracted disfigurement, or protracted loss of function of a body part or organ.⁵⁴

The fine ceilings come from the general federal fine statute, 18 U.S.C. 3571.⁶ If the offense caused someone a financial loss, the fine can be set as high as twice the loss amount, which may exceed those caps.

Attempts and Conspiracies

Success is not required. The statute expressly reaches anyone who “attempts or conspires” to commit any of the five offenses. Failing to breach a security perimeter, or planning with others to do so, carries the same penalties as completing the act.¹

Protests and the First Amendment

The First Amendment does not shield a protester who crosses into a restricted area. The Department of Justice has taken the position that this statute rests on trespass law — the government’s right to control who is on its property — and that peaceful demonstrations involve conduct subject to reasonable regulation when necessary to protect legitimate government interests.⁷

The disruptive conduct provision under subsection (a)(2) is not aimed at orderly protests and does not apply where there is no disturbance and no disruption of government activities. Courts have upheld statutes prohibiting obstruction of building entrances even when the obstruction is politically motivated.⁷ Standing outside the perimeter is one thing. Stepping inside it is a trespass charge waiting to happen.

Defenses

The most common defense goes to the word “knowingly.” If signs and barriers were inadequate, or the perimeter was not clearly communicated, a defendant can argue they didn’t know they were crossing into a restricted zone. The statute’s own requirement that the area be “posted, cordoned off, or otherwise restricted” gives that argument teeth. When the government hasn’t taken visible steps to mark the boundary, proving knowing entry gets harder.¹

Lawful authority is another. The statute only reaches entry “without lawful authority,” so a valid credential, membership in an authorized group, or explicit permission from a responsible official is a strong defense. It can also arise when officers gave conflicting instructions, and the defendant followed one officer’s directions into an area another officer treated as off-limits.

For the disruption and obstruction charges under subsections (a)(2) and (a)(3), the intent element is a target. Both require proof that the person specifically intended to impede government business, not just that a disruption happened. Someone swept up in a crowd who inadvertently blocked an entrance has a very different legal posture from someone who deliberately positioned themselves there.¹

Mistaken identity is available where the government leans on surveillance footage from crowded scenes. Claims that the arrest itself was unlawful, or that officers used excessive force, do not defeat the underlying charge, but they can support suppression of evidence or separate civil claims.

Who Enforces It

The U.S. Secret Service is the primary enforcer, which follows from the fact that the three categories of restricted area all revolve around Secret Service protectees or events the agency secures. When the President travels, Secret Service agents set the perimeter and decide how far it extends. The U.S. Capitol Police and Federal Protective Service may also enforce restrictions at government buildings within their respective jurisdictions. Federal officers can detain and arrest anyone suspected of a violation, including on public property that has been temporarily restricted for the occasion.