Simple English definitions for legal terms
Read a random definition: haec est conventio
The case-or-controversy requirement is a rule that says federal courts can only hear cases that involve a real problem or disagreement. They can't just give opinions on hypothetical situations. This means that people have to actually be in a dispute for a court to get involved. The terms "case" and "controversy" mean pretty much the same thing, but "controversy" is a smaller word that only applies to civil lawsuits.
The case-or-controversy requirement is a constitutional rule that states that for a federal court to hear a case, there must be an actual dispute involved.
For example, if someone wants to sue their neighbor for playing loud music at night, they can only do so if they have actually been affected by the noise. If they have not been affected, then there is no actual dispute, and the case cannot be heard in federal court.
This requirement is important because it ensures that federal courts only hear cases that have a real impact on people's lives. It prevents people from using the court system to ask hypothetical questions or to seek advisory opinions.