Chapter 15a. Interstate Transportation of Petroleum Products 15 U.S. Code §715. Purpose of chapter 15 U.S. Code §715a. Definitions 15 U.S. Code §715b. Interstate transportation of contraband oil forbidden 15 U.S. Code §715c. Suspension of operation of section 715b of this title 15 U.S. Code §715d. Enforcement of chapter 15 U.S. Code §715e. Penalties for violation of chapter 15 U.S. Code §715f. Forfeiture of contraband oil shipped in violation of law; procedure 15 U.S. Code §715g. Refusal of carrier to accept shipment without certificate of clearance; certificate as justifying acceptance of shipment 15 U.S. Code §715h. Hearings and investigation by boards; appointment of board and employees 15 U.S. Code §715i. Restraining violations 15 U.S. Code §715j. "President" as including agencies, officers and employees 15 U.S. Code §715k. Saving clause 15 U.S. Code §715m. Cooperation between Secretary of the Interior and Federal and State authorities