This is the 2007 Supplement to Gellhorn and Byse' Administrative Law, Cases and Comments, Revised 10th Edition. Like the volume it supplements, these materials are built on the premise that the basic Administrative Law course is not a single set of canonical cases, topics, and readings that all teachers should cover, but will reflect the interests of its particular instructor, the needs of his or her students, and the rest of the school's curriculum. With the publication of this 2007 Supplement, Professor Gillian Metzger of Columbia Law School has joined Professors Peter Strauss, Todd Rakoff, and Cynthia Farina as an editor of the book that remains the defining casebook in Administrative Law. The supplement addresses many important recent decisions and administrative law developments.