Customs regulations differ by country and govern the import and export of goods between countries. Certain items are prohibited, and duties must be paid on items exceeding allowance limits. India's customs regulations aim to prevent illegal trade and extend nationwide, dividing arriving passengers into green and red channels depending on whether they have dutiable goods. Tourists are allowed duty-free import of used personal effects and gifts up to specified value limits, with some variation based on nationality, and can export some personal electronics, sports equipment, and limited quantities of alcohol, tobacco, and currency. Strict controls govern import and export of restricted items like firearms, wild animals, and narcotics.