The Foreign Business Act (FBA) defines three restricted categories of commercial activities.
List 1 ( (Prohibited to Foreign Nationals):
Newspaper publishing, radio broadcasting, and television stations, Rice farming, arable farming, or horticulture, Livestock farming, Forestry and timber processing, Fishery within Thailand and its Exclusive Economic Zones (EEZ), Harvesting of Thai medicinal herbs, Trading and auctioning of Thai antiques or historical artifacts, Production or casting of Buddha images and alms bowls, Land trading.
List 2 ((Restricted, subject to Cabinet Approval):
Production, sale, and maintenance of firearms, ammunition, gunpowder, and explosives, Production of armaments, military vessels, aircraft, or vehicles, Domestic land, water, or air transportation, including domestic airlines, Trading of antiques or Thai arts and crafts, Production of wood carvings, Silkworm rearing, silk yarn production, silk weaving, or silk printing, Production of Thai musical instruments, Production of gold, silver, niello, bronze, or lacquerware, Production of Thai cultural and artistic pottery, Sugar manufacturing from sugarcane, Salt farming, including underground salt, Rock salt mining, Mining operations, Timber processing for furniture and utensils.
List 3 (Restricted, subject to a Foreign Business License):
Rice milling and flour production from rice, Fishery, specifically aquaculture, Timber extraction from plantation forests, Production of plywood, veneer, particleboard, or hardboard, Production of construction lime, Accounting services, Legal services, Architectural services, Engineering services, Construction, with specific statutory exemptions, Brokerage and agency services, with specific statutory exemptions, Auction activities, with specific statutory exemptions, Domestic trade of local agricultural products, Retail trading of all goods with total capital under THB 100,000,000 or minimum capital under THB 20,000,000 per outlet, Wholesale trading of all goods with minimum capital per outlet under THB 100,000,000, Advertising operations, Hotel business, excluding hotel management, Tour guide services, Sale of food and beverages, Plant breeding and propagation.
Conducting these activities without an authorized license triggers corporate fines from THB 100,000 to THB 1,000,000 and imprisonment for up to 3 years.