Yes, butterfly knives (balisongs) are legal in Puerto Rico for individuals aged 18 or older, as no territorial statute explicitly bans them. The Ley de Armas de Puerto Rico (Law 221-1974) regulates firearms and ammunition but omits edged weapons like balisongs from its prohibitions. Local law enforcement agencies, including the Policía de Puerto Rico, have not issued recent advisories classifying balisongs as prohibited weapons, though municipal ordinances may impose additional restrictions.
Key Regulations for Butterfly Knives (Balisongs) in Puerto Rico
- Age Restriction: Possession is restricted to individuals 18 years or older, aligning with the Ley de Armas’ age threshold for weapon ownership.
- Carry Prohibitions: Open or concealed carry in public spaces is subject to Ley 146-2019, which governs public safety and may treat balisongs as “dangerous instruments” if used in a threatening manner.
- Commercial Transactions: Dealers must comply with Departamento de Hacienda sales tax requirements and maintain transaction records for edged weapons, per Reglamento 8711 (2023).
Note: While no territorial ban exists, federal law under 18 U.S.C. § 930 may apply if balisongs are carried into federal facilities or during interstate commerce. The Oficina de Asuntos Legales de Puerto Rico has not updated its 2026 compliance guidelines to include balisongs, leaving ambiguity for travelers or commercial operators. Always verify municipal ordinances, as San Juan and Ponce have historically enforced stricter interpretations of “dangerous instruments.”