
A compact is a formal agreement between two or more parties, states, or nations on matters of common concern. It is a type of contract that creates obligations and rights capable of being enforced between the parties. Compacts are often used to establish multi-state agencies that coordinate policy or perform tasks on behalf of member states. On the other hand, a law is a rule or set of rules that are enacted by a government or other authority and are typically enforced by the state. While compacts can become laws, they are not always the same as laws, as they are contractual in nature and may not always be legally binding.
| Characteristics | Values |
|---|---|
| Definition | Compact: A formal agreement between two or more parties, states, etc. Law: A rule or system of rules that are enforced by a country or community |
| Nature | Compacts are not uniform laws because of their contractual nature |
| Consent | Congress must explicitly approve any compact that would give a state power designated to the federal government |
| Applicability | A compact may be limited to a certain multi-state region or open to all states and insular areas |
| Unilateral Action | A state cannot unilaterally change the terms of a compact |
| Constitutional Basis | The Compact Clause (Article I, Section 10, Clause 3) of the US Constitution prohibits states from entering into agreements or compacts without the consent of Congress |
| Standing | Compacts have standing as binding state law and as a contract between member states |
| Precedence | The terms of a compact take precedence over state law and even provisions of a state's constitution |
| Enforcement | A state law that contradicts or conflicts with a compact is unenforceable |
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What You'll Learn
- A compact is a formal agreement between states or nations, whereas a law is a rule or set of rules
- Compacts are contracts between states, laws are not
- Compacts are formed with the consent of Congress, laws are not
- Compacts may establish multi-state agencies, laws do not
- Compacts are not uniform laws due to their contractual nature

A compact is a formal agreement between states or nations, whereas a law is a rule or set of rules
A compact is a formal agreement between two or more states or nations on matters in which they have a shared concern. It is a type of contract that creates obligations and rights capable of being enforced and contemplated between the parties. Compacts are distinct from laws in that they are agreements between multiple states or nations, whereas a law is a rule or set of rules that govern a specific area or jurisdiction.
The term "compact" is often used in the context of interstate compacts, which are agreements between US states. For example, the Republican River Compact was an interstate compact that was initially vetoed by President Franklin D. Roosevelt in 1942. Interstate compacts may involve the creation of a new multi-state governmental agency responsible for administering or improving a shared resource, such as a seaport or public transportation infrastructure. They can also be limited to a specific multi-state region or open to all states and insular areas.
Compacts can also be established between a self-governance tribe and the United States, affirming the government-to-government relationship between them. In this context, a compact differs from an annual funding agreement (AFA) as parts of the compact apply to all bureaus within the Department of the Interior rather than a single bureau.
While compacts are not uniform laws, they can have the force of law and take precedence over state law. For example, in the case of Nebraska v. Central Interstate Low-Level Radioactive Waste Commission, the court held that Nebraska did not have the unilateral right to exercise a veto over the actions of an interstate commission created by a compact. Similarly, in C.T. Hellmuth & Assocs., Inc. v. Wash. Metro. Area Transit Auth., the court held that a compact constitutes law and a contract that cannot be amended or modified without the consent of all parties.
In summary, a compact is a formal agreement between states or nations that creates enforceable obligations and rights, while a law is a rule or set of rules governing a specific area or jurisdiction. Compacts may involve the creation of multi-state agencies and can take precedence over state law, but they are not uniform laws themselves.
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Compacts are contracts between states, laws are not
Compacts are agreements between states, whereas laws are not. The term "compact" is used to refer to more formal and serious engagements than the term "agreement". Compacts are often used to address matters in which the involved parties have a common concern.
Compacts are also distinct from model acts, which are proposed statutes created by non-governmental bodies of legal experts for state legislatures to pass independently. They are also different from executive agreements between governors or statewide executive officers, which may or may not have the support of state statute or constitutional law.
Compacts stand as an exception to the rule that a sitting state legislature cannot irrevocably bind future state legislatures. Once a compact is enacted, it becomes a contract that cannot be amended, modified, or altered without the consent of all parties. This means that a state cannot unilaterally change the terms of a compact, and a compact takes precedence over statutory law in member states.
In the United States, the Compact Clause (Article I, Section 10, Clause 3) of the Constitution prohibits a state from entering into a compact with another state without the consent of Congress. This clause ensures that compacts receive explicit congressional approval and are approved by both houses of Congress before becoming law.
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Compacts are formed with the consent of Congress, laws are not
The term "compact" is most often used to refer to formal agreements between states or nations on matters of shared concern. Compacts are distinct from laws in that they require the consent of Congress, as outlined in the Compact Clause of the US Constitution, which states that "no state shall, without the consent of Congress, enter into any agreement or compact with another state, or with a foreign power".
The timing of Congressional consent is not specified in the Constitution, so it may be given before or after states have agreed to a particular compact. This consent may be explicit or inferred from circumstances, and Congress may also impose conditions as part of its approval. For example, Congress must explicitly approve any compact that would give a state power that is otherwise designated to the federal government. Treaties between states ratified under the Articles of Confederation after American independence in 1776, such as the Treaty of Beaufort which set the boundary between Georgia and South Carolina, are treated as interstate compacts.
Compacts may also establish multi-state agencies to coordinate policy or perform tasks on behalf of member states. These agencies can take the form of commissions, with each member state having a representative with a voting role, or they may opt to cooperate with a single independent non-profit organisation. The actions or rule changes made by these commissions or non-profits may require ratification by member states to take effect, particularly if they alter the terms of the compact.
Compacts are also different from laws in that they have a contractual nature, creating obligations and rights capable of being enforced between the parties. As such, compacts take precedence over state laws and even provisions in a state's constitution. For example, in Nebraska v. Central Interstate Low-Level Radioactive Waste Commission, the court held that Nebraska did not have the unilateral right to exercise a veto over the actions of an interstate commission created by a compact. Similarly, in C.T. Hellmuth & Assocs., Inc. v. Wash. Metro. Area Transit Auth., the court held that “a compact constitutes not only law but a contract which may not be amended, modified, or otherwise altered without the consent of all parties”.
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Compacts may establish multi-state agencies, laws do not
The term "compact" is used in the context of formal agreements between states or nations on matters of shared concern. Compacts are distinct from laws in several ways, including the fact that compacts may establish multi-state agencies, while laws do not.
Interstate compacts can lead to the creation of new multi-state governmental agencies responsible for managing or improving shared resources such as seaports or public transportation infrastructure. These agencies can take the form of commissions, with each member state having a representative and a voting role. Alternatively, member states may choose to collaborate with a single independent non-profit organisation to carry out specific tasks without government funding.
The actions or rule changes made by these commissions or non-profits may require ratification by the member states to take effect, particularly if they alter the terms of the compact. This process highlights the collaborative nature of compacts, where decisions are made through consensus and agreement among the participating states.
In contrast, laws are typically enacted by a single state or nation and do not inherently involve the establishment of multi-state agencies. Laws are often more unilateral in nature, reflecting the policies and decisions of a particular state or jurisdiction. While laws can facilitate cooperation between states, they do not inherently establish the same level of multi-state collaboration as compacts.
Compacts, therefore, provide a framework for states to work together and establish multi-state agencies to address shared concerns and manage shared resources. This unique feature of compacts allows for a more integrated and cooperative approach to policy coordination and task execution among the participating states.
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Compacts are not uniform laws due to their contractual nature
Compacts are agreements among states or between nations on matters in which they share a common concern. They are distinct from laws due to their contractual nature, which creates obligations and rights that can be enforced between the parties. In the US context, the Compact Clause of the Constitution prohibits one state from entering into a compact with another state without the consent of Congress. This clause recognises compacts as agreements that are more formal and serious than typical state-level agreements.
Compacts are not uniform laws because they are contractual agreements between states, and as such, they take precedence over state laws and even state constitutional provisions. For example, in the case of Nebraska v. Central Interstate Low-Level Radioactive Waste Commission, the court held that Nebraska could not unilaterally exercise a veto over the actions of an interstate commission created by a compact. Similarly, in C.T. Hellmuth & Assocs., Inc. v. Wash. Metro. Area Transit Auth., the court affirmed that compacts, once enacted, constitute law and a contract that cannot be amended or modified without the consent of all parties.
The contractual nature of compacts also means that they can supersede prior and subsequent statutes of signatory states. This was demonstrated in the case of Wroblewski v. Commonwealth, where the court held that the terms of an interstate compact contain the substantive obligations of the parties, and the Contracts Clause of the Federal Constitution protects compacts from impairment by the states. Thus, compacts stand as an exception to the rule that a sitting state legislature cannot irrevocably bind future state legislatures.
Furthermore, compacts may establish multi-state agencies to coordinate policy or perform tasks on behalf of member states. These agencies can take the form of commissions, with each member state having a representative with a voting role. Alternatively, member states may opt for cooperation with a single independent non-profit organisation to carry out designated tasks without government funding. The actions or rule changes made by these commissions or non-profits may require ratification by the member states to take effect, particularly if they alter the terms of the compact.
In summary, compacts are not uniform laws due to their contractual nature, which creates binding obligations and rights between the member states. Compacts take precedence over state laws and constitutional provisions, supersede prior and subsequent statutes, and establish multi-state agencies to coordinate policies and perform tasks. The unique nature of compacts as contractual agreements between states sets them apart from uniform laws and allows for greater flexibility and cooperation between the parties involved.
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Frequently asked questions
A compact is a formal agreement between two or more parties, states, or nations on matters in which they have a common concern.
The word "compact" is generally used to refer to more formal and serious engagements than the term "agreement".
For an interstate compact to become a federal law, it must be approved by both houses of Congress and signed into law by the President.
No, a compact cannot be amended, modified, or otherwise altered without the consent of all parties.
Yes, a compact can be different from a law. A compact is a contractual agreement between parties that creates obligations and rights capable of being enforced.






























