Finality and factual development help show whether the dispute is ready. An informal suggestion, draft proposal, or contingent threat may change before affecting anyone. A final rule with present compliance duties supplies a more definite legal question. Factual uncertainty also matters: a court may be unable to evaluate a constitutional claim until officials choose how to apply a broad policy to a particular person.

Compare two challenges to an agency policy. In the first, the agency has circulated an early proposal that may be revised and has taken no enforcement step. A business asks a court to decide whether every possible final version would be lawful. That dispute is likely premature. In the second, the agency has issued a final rule requiring the business to spend millions immediately or face a credible enforcement threat. A pre-enforcement challenge may be ripe because the legal issue is defined and waiting would impose present costs. Ripeness does not always require a person to violate a rule and suffer punishment before seeking review.

Pre-enforcement review illustrates the balance. A person should not always have to choose between costly compliance and deliberate violation before testing a credible legal command. At the same time, a vague fear that government might someday regulate an activity is insufficient. Look for a definite rule, a credible threat, present planning or compliance costs, and a legal issue that would not benefit from further factual development.

Time supplies the decisive contrast among related doctrines. Standing asks whether this plaintiff has the required injury and connection to the defendant. Ripeness asks whether the threatened dispute has matured enough for decision. Mootness asks whether a dispute that was once live has ended so that effective relief is generally no longer available. A speculative threatened injury can implicate both standing and ripeness, so identify whether the defect is the plaintiff's injury, the dispute's timing, or the disappearance of a once-real controversy.

The shorthand is "too early" for ripeness and "too late" for mootness, but do not stop there. Explain what future event remains uncertain or what effective remedy disappeared. The reason, not the slogan, decides the scenario.

Video lesson: Supreme Court of the United States Procedures: Crash Course Government and Politics #20