Compliance is critical for cross-border trade. You must ensure the product adheres to RoHS (Restriction of Hazardous Substances), particularly regarding the solder used in the internal electronics. For the US market, compliance with the Lacey Act is mandatory to ensure that the wood used was legally harvested. If the guitar features Rosewood (Dalbergia), you must verify if it requires CITES certification, though many manufacturers now use alternatives like Pau Ferro or Laurel to simplify customs clearance. For electronic components like active pickups or built-in preamps, CE and FCC markings may be required.