Necessary and Proper Clause
• WikipediaThe first practical example of this contention came in 1791, when Hamilton used the clause to defend the constitutionality of the creation of the First Bank of the United States, the first federal bank in the new nation's history.
Colorado Court of Appeals -- June 1, 2006
No. 04CA0492. People v. Jones.
http://www.cobar.org/opinions/ opinion.cfm?opinionid=5625& courtid=1