At EU level the reference figure for hemp is 0.3 per cent THC, set for agricultural purposes by Regulation (EU) 2021/2115, and separate maximum levels apply to hemp seed foods as contaminants.
Finland sets no THC threshold at all. Neither the narcotics act nor any annex of the government decree on substances regarded as narcotics contains a percentage, a milligram-per-kilogram figure, or an industrial hemp carve-out. The narcotics act prohibits the production, manufacture, importation into Finnish territory, exportation, transport, transit, distribution, trade, handling, possession and use of a narcotic. Tetrahydrocannabinol and its isomers are listed, and separately the first annex lists cannabis, cannabis resin, and cannabis extracts and tinctures, with no THC qualifier and no hemp exception. A full-spectrum hemp extract is textually a cannabis extract.
The only THC figures operating in Finland are the EU contaminant maxima applied by the food authority to permitted hemp seed foods. Those are food safety limits for a lawful product category; they are not a narcotics tolerance and they do not make anything lawful that would otherwise not be.
The Supreme Court confirmed the practical consequence in December 2023, upholding narcotics convictions on cannabis flower testing between 0.2 and 0.3 per cent THC - at or below the EU field threshold - and convicting the recipient of the postal consignments alongside the importer.