In 2015, in Johnson v. United States, the Supreme Court struck down the “residual clause” of the Armed Career Criminals Act (ACCA) as unconstitutionally vague, ruling that the provision did not give ordinary people adequate notice of what conduct was prohibited by the statute. The residual clause had included among the category of “violent felonies” any felony that “otherwise involves conduct that presents a serious potential risk of physical injury to another.” Next week, in Beckles v. United States, the court will confront the constitutionality of the sentencing guidelines’ version of the residual clause. This is one of two cases this term that address the effect of Johnson on the vagueness doctrine. (The other case, Lynch v. Dimaya, arises in a statutory context.) Two of the nine justices who joined in the six-justice majority opinion in Johnson, including its author – the late Justice Antonin Scalia – will not participate in this case. Because Justice Elena Kagan is recused, a seven-member court will render a decision.

The U.S. Sentencing Commission, which is responsible for drafting and amending the sentencing guidelines, removed the guideline residual clause earlier this year and supplanted it in part by commentary, which is also at issue here. It did not, however, make the change retroactive. This case brings the question of retroactivity squarely in front of the court, continuing the interplay between the commission and the court. The ostensible issues of vagueness and retroactivity, however, camouflage a broader question about the meaning and function of advisory guidelines.

Notably, the government has changed its position on both retroactivity and vagueness. Although it supported the defendant’s claims in the U.S. Court of Appeals for the 11th Circuit – and those of similarly situated defendants in other circuits – it opposes them now. Adding another dimension to the controversy, the court appointed an amicus, or “friend of the court,” to defend the 11^th Circuit’s holding that the vagueness doctrine does not apply to the sentencing guidelines. The decision in this case, therefore, will have broad ramifications for vagueness jurisprudence, the meaning of advisory guidelines, and the respective roles of the commission and the court.