Whether mandatory language in a prison regulation, by itself, creates a protected liberty interest requiring federal due-process protections.
Holding
No. A State's use of mandatory language in prison regulations does not, by itself, create a protected liberty interest.
Reasoning
The Court rejected the methodology associated with Hewitt v. Helms, under which courts searched prison regulations for mandatory language and substantive predicates that constrained official discretion. That approach had shifted attention away from the nature of the deprivation and toward technical parsing of regulatory wording.
The Court concluded that the Hewitt approach created perverse incentives. States could avoid constitutional litigation by declining to issue detailed rules or by giving prison staff unbounded discretion, even though clear rules can promote consistency, safety, and sound prison administration.
The mandatory-language inquiry also drew federal courts into routine prison-management disputes. A regulation designed to guide staff, the Court explained, is not necessarily intended to confer an enforceable entitlement on inmates; a negative implication from such a rule should not automatically trigger the procedural requirements of Wolff.