The fair use doctrine in copyright law balances expressive freedoms by permitting one to use another\u27s copyrighted expression under certain circumstances. The doctrine\u27s extreme context-sensitivity renders it of little value to those who require reasonable ex ante certainty about the legality of a proposed use. In this Article, Professor Carroll advances a legislative proposal to create a Fair Use Board in the U.S. Copyright Office that would have power to declare a proposed use of another\u27s copyrighted work to be a fair use. Like a private letter ruling from the IRS or a “no action” letter from the SEC, a favorable opinion would immunize only the petitioner from copyright liability for the proposed use, leaving the copyright owner...