Rico absconded while serving a term of supervised release, and the government argued that the term automatically stopped running during his absence. The Supreme Court held that the Sentencing Reform Act does not authorize judge-made fugitive tolling of supervised release. Congress specified circumstances in which a supervised-release term is tolled or may be extended, and absconding is not among them. Courts may issue warrants, revoke release, and impose authorized sanctions for violations, but they may not lengthen the statutory term by adding an extra-textual tolling rule. The judgment was reversed and the case remanded.