Compliance is critical to avoid customs seizures. For the US market, products must comply with California Proposition 65 regarding lead and phthalate content. For the EU market, ensure materials meet REACH regulations (Registration, Evaluation, Authorisation, and Restriction of Chemicals). If the bags are intended for children or students, they must meet CPSIA standards. Always request Physical Lab Test Reports from the supplier covering colorfastness to rubbing, seam strength, and attachment strength of handles.