Compliance varies by target market. For the US market, products must comply with the CPSIA (especially for children's shorts regarding lead and phthalates) and FTC labeling requirements (fiber content, country of origin, and RN number). For the EU market, adherence to REACH regulations regarding chemical substances is mandatory. I highly recommend sourcing from suppliers with OEKO-TEX Standard 100 certification, which guarantees the garment is free from harmful substances, and BSCI or Sedex audits to ensure social compliance in the manufacturing process.