How to Fight Conflict Minerals? Mandatory Disclosure.

At least in theory, one of the best ways for Congress to protect consumers and investors is by requiring companies to disclose information. Credit card providers must inform you about potential late fees; new cars are sold with fuel-economy stickers; calorie labels are being required at chain restaurants. The Consumer Financial Protection Bureau even has a slogan, which orients much of its work: Know Before You Owe.

Last August, an unreasonably aggressive ruling from a three-judge panel of a federal court of appeals cast doubt on the constitutionality of such disclosure requirements. The full court is now deciding whether to review the panel’s decision. If it refuses to do so, the Supreme Court should intervene.