
The ONU technical protocols are the worldwide reference for forensic substance identification.
📷 AECANI Visual Lab
International Standard
The 1% THC is not an invention of AECANI: it is the technical threshold recognized by the United Nations in its official cannabis identification manual.
What is the ST/NAR/40?
The manual provides:
- Botanical identification methods
- Chemical analysis protocols
- Technical classification criteria
- Standardized forensic procedures
The 1% Threshold
The manual states that for scientific identification purposes:
"Cannabis with a THC content of less than 1% is considered industrial hemp, distinguishable from psychoactive cannabis.
This is not a policy recommendation: it is a scientific finding based on:
- Clear genetic differences between industrial and narcotic varieties
- Cannabinoid profiles dominated by CBD
- Proven absence of significant psychoactive effects below this level

Forensic standardization allows authorities to accurately distinguish agricultural material from narcotics.
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Global Implications
If ONU itself recognizes 1% as the technical threshold:
- It is scientifically valid to distinguish hemp with this criterion in national laws
- The 0.2% is unnecessarily restrictive and lacks an international technical basis
- Countries can adopt the 1% with full support of the ONU protocols
Argument for Spain
NLP 2023 expressly cites the ST/NAR/40 Manual as the technical basis for raising the threshold to 1% THC in Spain.
📚 References
- UNODC - ST/NAR/40, Recommended Methods for the Identification and Analysis of Cannabis
- PNL 161/004241 (2023) - Congress of Deputies