A complete guide to the licenses required under the Herbal Products Act B.E. 2562 (2019) to manufacture, import, sell, or advertise herbal products in Thailand, with a focus on cannabis business operators. Covers the fees (5,000 THB for manufacturing, 20,000 THB for import, 1,500 THB for sales, 2,500 THB for advertising), the three product registration tracks (notification, detailed notification, formula registration), the documents and signage required, the step-by-step procedure at the FDA and at Provincial Public Health Offices, the timeline, the five-year validity, the renewal at half the fee, and the specific compliance points where the Herbal Products Act intersects with the 2025 Notification on Controlled Herbs (Cannabis) and the GACP requirement.