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Vagueness doctrine

Concept in American constitutional law

  • 7 min read
  • 3 chapters

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Through Statute, Legal doctrine and Supreme Court of the United States

The "void for vagueness" legal doctrine does not apply to private law (that is, laws that govern rights and obligations as between private parties), only to laws that govern rights and obligations vis-a-vis the government. The doctrine also requires that to qualify as constitutional, a law must:

  • State explicitly what it mandates, and what is enforceable.
  • Define potentially vague terms.

Roots and purpose

The void for vagueness doctrine derives from the Due Process Clauses of the Fifth and Fourteenth Amendments to the United States Constitution. That is, vague laws unconstitutionally deprive people of their rights without due process.

The following pronouncement of the void for vagueness doctrine was made by Justice Sutherland in Connally v. General Construction Co., 269 U.S. 385, 391 (1926):

[T]he terms of a penal statute [...] must be sufficiently explicit to inform those who are subject to it what conduct on their part will render them liable to its penalties… and a statute which either forbids or requires the doing of an act in terms so vague that men of common intelligence must necessarily guess at its meaning and differ as to its application violates the first essential of due process of law.

The void for vagueness doctrine requires that laws are so written that they explicitly and definitely state what conduct is punishable. The doctrine thus serves two purposes. First, all persons receive a fair notice of what is punishable and what is not. Second, it helps prevent arbitrary enforcement of the laws and arbitrary prosecutions. The void for vagueness doctrine developed because, "When Congress does not set minimum guidelines to govern law enforcement, there is no limit to the conduct that can be criminalized."

Grayned v. City of Rockford, 408 U.S. 104, 391 (1972):

Vague laws offend several important values. First, because we assume that man is free to steer between lawful and unlawful conduct, we insist that laws give the person of ordinary intelligence a reasonable opportunity to know what is prohibited, so that he may act accordingly. Vague laws may trap the innocent by not providing fair warning. Second, if arbitrary and discriminatory enforcement is to be prevented, laws must provide explicit standards for those who apply them. A vague law impermissibly delegates basic policy matters to policemen, judges, and juries for resolution on an ad hoc and subjective basis, with the attendant dangers of arbitrary and discriminatory application. Third, but related, where a vague statute ‘abut(s) upon sensitive areas of basic First Amendment freedoms,’ it ‘operates to inhibit the exercise of (those) freedoms.’ Uncertain meanings inevitably lead citizens to “steer far wider of the unlawful zone' . . . than if the boundaries of the forbidden areas were clearly marked.'

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