OBS_VALUE: Only for nationals considered under Visa Groups 3 and 4. Independent Service Suppliers (ISS) will be registered as “Categoría especial”, approval by the Ministry of Labour and Social Security (MTSS) is required. More information regarding Visa Groups http://www.migracion.go.cr/extranjeros/visas/directrices_ingreso/Directriz%20Visas%20de%20Ingreso%20-%20Circular%200022-08-2014.pdf