Amends the federal riot law (18 U.S.C. §2101) to restructure penalties: it updates cross-references, creates a new subsection that defines three tiers of punishments (with specified prison terms and fines) for violating the riot prohibition, and adjusts later language to match the new paragraph numbering. The change keeps the basic offense but reorganizes how punishments are set and referenced, which affects sentencing and prosecution of riot-related conduct.