Compliance with CITES (Convention on International Trade in Endangered Species) is critical, especially if the guitar uses restricted woods like Brazilian Rosewood or certain species of Mahogany. Ensure the supplier provides a Phytosanitary Certificate to prove the wood is pest-free. For the US market, adherence to the Lacey Act is mandatory, requiring full disclosure of the wood's origin. Additionally, check for REACH or RoHS compliance regarding the lacquers and finishes (e.g., Nitrocellulose vs. Polyurethane) used on the instrument.