Remaining within the four corners

“The authoritative statement is the statutory text, not the legislative history or any other extrinsic material. Extrinsic materials have a role in statutory interpretation only to the extent they shed a reliable light on the enacting Legislature’s understanding of otherwise ambiguous terms. Not all extrinsic materials are reliable sources of insight into legislative understandings, however, and legislative history in particular is vulnerable to two serious criticisms. First, legislative history is itself often murky, ambiguous, and contradictory. Judicial investigation of legislative history has a tendency to become, to borrow Judge Leventhal’s memorable phrase, an exercise in ‘ “looking over a crowd and picking out your friends.” ‘ Second, judicial reliance on legislative materials like committee reports, which are not themselves subject to the requirements of Article I, may give unrepresentative committee members—or, worse yet, unelected staffers and lobbyists—both the power and the incentive to attempt strategic manipulations of legislative history to secure results they were unable to achieve through the statutory text.” – Justice Anthony Kennedy, Exxon Mobil Corp. v. Allapattah Services, Inc. (545 U.S. 546, 568 (2005); internal citations omitted)