In law, the legislative intent of the legislature in enacting legislation may sometimes be considered by the judiciary when interpreting the law (see judicial interpretation). The judiciary may attempt to assess legislative intent where legislation is ambiguous, or does not appear to directly or adequately address a particular issue, or when there appears to have been a legislative drafting error.
The courts have repeatedly held that when a statute is clear and unambiguous, the inquiry into legislative intent ends at that point. It is only when a statute could be interpreted in more than one fashion that legislative intent must be inferred from sources other than the actual text of the statute.
Courts frequently look to the following sources in attempting to determine the goals and purposes that the legislative body had in mind when it passed the law:
Courts in the United States and elsewhere have developed a number of principles for handling such evidence of legislative intent; as an example, many courts have suggested that the comments of those opposing a bill under consideration should be treated with skepticism, on the principle that opponents of a bill may often exaggerate its practical consequences.
One early example of an important Supreme Court case which relied on legislative intent was Johnson v. Southern Pacific Co. (1904) 196 U.S. 1, where the court decided that a man may sue the railroad for failing to have an automatic coupler since the legislature was attempting to remedy the problem of multiple injuries by railroad coupling.
Others, most notably United States Supreme Court Justice Antonin Scalia, have objected generally to the use of such evidence, rather than reliance on the literal language of the statute, arguing that such evidence of "legislative intent" is often created by proponents of a bill to persuade a court to interpret the statute in a way that they were not able to persuade the legislative body to adopt when passing the bill.
These principles of legislative intent often overlap with those principles of statutory construction that courts have developed to interpret ambiguous or incomplete legislation. As an example, the principle that courts should not interpret a statute to produce absurd or unintended results will often be informed by evidence of what the proponents of a bill stated about the objectives to be achieved by the statute.