Delays laws affecting Congressional salary from taking effect until after the next election of representatives. Proposed September 25, 1789; ratified May 7, 1992, 202 years and 7 months later. The Twenty-seventh Amendment to the United States Constitution states that any law that increases or decreases the salary of members of Congress may take effect only after the next election of the House of Representatives has occurred. It is the most recently adopted amendment but was one of the first proposed. Wiki link