Compliance is non-negotiable in the tire industry. For the US market, ensure tires are DOT certified; for the European Union, E-mark (ECE) certification and S-mark (Sound) are mandatory. Furthermore, check for ISO/TS 16949 quality management system certification, which is the gold standard for automotive industries. If you are sourcing for the Brazilian market, INMETRO certification is required, while GCC (GSO) is essential for Middle Eastern regions. Failure to meet these standards can lead to customs seizures and legal liabilities.