Privileges and Immunities Clauses

The United States Constitution contains two distinct but similarly named clauses designed to foster national unity by limiting discrimination based on state citizenship. Understanding the differences between the Article IV Privileges and Immunities Clause and the Fourteenth Amendment Privileges or Immunities Clause is essential for grasping how the Constitution shapes the relationship between states, their citizens, and the federal government. These clauses serve as critical mechanisms for protecting fundamental rights and defining the boundaries of state power, ensuring that the United States functions as a single nation rather than a collection of isolated sovereignties.

The Article IV Privileges and Immunities Clause

Found in Article IV, Section 2, the clause states: "The Citizens of each State shall be entitled to all Privileges and Immunities of Citizens in the several States." This is often called the Comity Clause, as it promotes harmony and mutual respect among the states. Its core purpose is to prohibit a state from discriminating against citizens of other states regarding their fundamental rights. It does not require states to treat non-residents and residents identically in all matters, but it forbids discrimination on matters fundamental to national citizenship.

The central legal question becomes: what are the "Privileges and Immunities" that a state must extend to visiting citizens? Courts have interpreted these as rights fundamental to the preservation of the Union. These are not all the rights a state grants its own people, but those which are essential to the pursuit of common callings, livelihood, and civic life. Classic examples include the right to travel through another state, the right to access its courts, the right to own property, and the right to engage in peaceful business or professional pursuits on substantially equal terms with residents. For instance, a state cannot bar a non-resident attorney from practicing law in its courts simply because they live elsewhere, as that infringes upon a fundamental commercial right.

The Fourteenth Amendment Privileges or Immunities Clause

Ratified after the Civil War, the Fourteenth Amendment states: "No State shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States." Note the critical linguistic shift from "Privileges and Immunities" to "privileges or immunities." More importantly, this clause protects the rights of national citizenship from state infringement, as opposed to Article IV’s focus on interstate non-discrimination.

The scope of this clause was severely limited by the Slaughter-House Cases (1873). In a controversial 5-4 decision, the Supreme Court drew a sharp distinction between state citizenship and federal (United States) citizenship. The Court held that the "privileges or immunities" protected by the Fourteenth Amendment were only those that owed their existence to the federal government, such as the right to petition Congress or to use the nation’s navigable waterways. Most civil rights, including those essential to economic liberty, were deemed privileges of state citizenship and left unprotected by this clause. This narrow interpretation rendered the Privileges or Immunities Clause largely dormant for over a century, with the Due Process and Equal Protection Clauses of the same amendment taking on the work of incorporating fundamental rights against the states.

The Corfield v. Coryell Framework

To understand the original public meaning of "privileges and immunities," courts and scholars often look to the seminal case Corfield v. Coryell (1823), decided by Justice Bushrod Washington on circuit. While interpreting the Article IV clause, Justice Washington provided a foundational, though non-exhaustive, list of protected privileges. He described them as those rights "which are, in their nature, fundamental; which belong, of right, to the citizens of all free governments."

The Corfield framework included rights such as protection by government, the right to acquire and possess property, the right to travel, and the right to pursue a lawful trade or profession. This formulation was profoundly influential and was directly cited during the debates over the Fourteenth Amendment. The Framers of that Amendment sought to constitutionalize these fundamental, Corfield-style rights and protect them—especially for newly freed slaves—from state violation. Therefore, Corfield serves as the intellectual bridge between the two clauses, illustrating the core set of fundamental rights the Constitution’s architects sought to secure.

Modern Analysis and Permissible Justifications

Today, when a law is challenged under the Article IV Privileges and Immunities Clause, courts apply a two-step analysis. First, they determine whether the activity or right burdened by the state is "fundamental" under the clause—typically involving economic pursuits, livelihoods, or essential civic activities. Second, if the law discriminates against non-residents regarding such a fundamental right, the state must show a substantial reason for the discrimination. The state’s justification must be closely related to the problem it seeks to solve.

There are several permissible justifications for differential treatment of non-residents. A state may discriminate if it is addressing a specific, serious problem uniquely caused by non-residents. Classic examples include:

• Residency Requirements for Voting: A state may limit voting to its residents to preserve the political integrity of its self-governance.
• Higher Fees for Non-Resident Hunting/Fishing Licenses: This can be justified as a conservation measure, as residents already support wildlife management through general taxes, while non-residents do not.
• Higher Tuition at State Universities: This is justified by the fact that state residents (or their parents) have subsidized the university through years of state tax payments.

The key is that the discrimination must be a good fit for solving a genuine problem; it cannot be mere economic protectionism for resident businesses or individuals.

Common Pitfalls

Confusing the Two Clauses: The most frequent error is conflating the Article IV and Fourteenth Amendment clauses. Remember: Article IV is an anti-discrimination rule between states regarding fundamental rights. The Fourteenth Amendment’s clause is a limitation on state power that protects rights of national citizenship, though its impact was neutered by Slaughter-House.

Assuming All Differential Treatment is Invalid: A common mistake is to think any law that treats non-residents differently violates Article IV. The clause only protects fundamental rights, and even then, the state can prevail if it has a substantial reason. Higher tolls for non-resident drivers on a specific bridge might be permissible if tied to maintenance costs, whereas a flat ban on non-residents practicing medicine would not.

Misapplying the Level of Scrutiny: Students sometimes apply "strict scrutiny" from Equal Protection jurisprudence to Article IV cases. The correct standard is a form of intermediate scrutiny: the state must show a substantial reason for the discrimination and a close fit between the means and the end. The state’s burden is significant but not as high as under strict scrutiny.

Overlooking the "Citizen" Limitation: Both clauses protect citizens of the United States. They do not, by their own force, extend the same protections to aliens or corporations. Other constitutional doctrines, like the dormant Commerce Clause or Equal Protection, may apply to those entities.

Summary

• The Article IV Privileges and Immunities Clause is an anti-discrimination provision that forbids states from denying citizens of other states the fundamental rights essential to national unity, such as the right to pursue a livelihood.
• The Fourteenth Amendment Privileges or Immunities Clause was intended to protect the fundamental rights of national citizenship from state abridgment, but its scope was drastically limited by the Slaughter-House Cases, making it a shadow of its intended self.
• The Corfield v. Coryell decision provides the classic historical framework for understanding what the founders considered "fundamental" privileges and immunities, forming a conceptual link between the two constitutional clauses.
• Discrimination against non-residents under Article IV is permissible if the state can demonstrate a substantial reason for the differential treatment, such as conserving natural resources or ensuring the integrity of a state-specific benefit funded by resident taxpayers.