Is a statute of limitations an affirmative defense, not a pleading requirement?

Is there a statute of limitations defense at the pleading stage? (MultiRegion, United States of America)

When a statute requires knowledge of the jurisdictional element of a claim, when the statute itself states that knowledge is not an essential element, is that knowledge required? (MultiRegion, United States of America)

Is laches an equitable affirmative defense available for actions that do not have a specific applicable statute of limitations? (MultiRegion, United States of America)

Does the contention in the second cause of action under the Statute of Limitations apply to a claim that a claim for money had and received and therefore comes within the statute of limitation? ("New York", United States of America)

Is a defendant required to plead and prove to exhaust the affirmative defense? (MultiRegion, United States of America)

Does a plea of not guilty raise the affirmative statute of limitations defense? (MultiRegion, United States of America)

What is the limitation period for liabilities created by a statute or statute? (MultiRegion, United States of America)

Does a pro se pleading under the extradition statute have to be considered a "defect" in the context of the pleading? (MultiRegion, United States of America)

Can a borrowed state statute of limitations be tolled in a claim based on a federal statute? (MultiRegion, United States of America)

What is the limitation of the statute-of-limitations period? (MultiRegion, United States of America)