The session introduces the licensed Custom Broker exam class for April 2018, detailing course materials and focusing on question 15 from the October 2017 exam about check valve classification. It explains customs classification rules, the significance of headings, and the classification of valves. Additionally, it covers the anti-dumping mechanism, the Department of Commerce's role, and the Enforce and Protect Act, clarifying evasion definitions and the importance of these concepts in customs examinations.