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Drug Possession — Quantity Thresholds and the Intent-to-Supply Presumption
Public Prosecutor v Defendant (Drug-Possession Charge)
Composite summary — not a single reported case. This entry distils a settled line of Thai Supreme Court (Dika / ฎีกา) authority for legal education. It is not a transcript of one reported judgment, and the heading is not a citable case number. Do not cite it as specific case law — consult a Thai-qualified lawyer for the authoritative Dika number and current application.
Facts
A defendant was arrested with a quantity of a controlled drug (methamphetamine, heroin, cannabis pre-2022, MDMA). The prosecution charged 'possession for the purpose of disposal' (broadly, supply / intent-to-supply) on the basis that the quantity exceeded a threshold defined in regulation, or on circumstantial evidence (multiple bags, scales, cash, messages).
Legal Issue
How the 2021 reform of the Narcotics Code (Code on Narcotics B.E. 2564 (2021)) restructured drug-quantity thresholds, presumptions, and sentencing — and how the courts assess intent to supply versus personal use.
Holding
Under the reformed Narcotics Code, prior bright-line presumptions of intent to supply based purely on quantity have been substantially softened. The court must consider the totality of evidence — quantity is now an important factor but not a conclusive presumption — and is required to assess the actual purpose of possession. The Code emphasises rehabilitation for users and proportionate sentencing. Some prior conviction lines under the old Act remain valid for offences committed before the reform; the new law applies prospectively (and in some respects retrospectively where it benefits the defendant).
Reasoning
The reform addressed long-standing concerns that pure quantity thresholds had drawn ordinary users into supply-level penalties. The reform aligns Thai law more closely with rehabilitation-oriented policy and international human-rights norms while preserving serious penalties for genuine traffickers.
Significance
One of the most economically and socially consequential criminal-law reforms in recent Thai history. Highly relevant to foreigners arrested with small quantities while traveling.
Practical Takeaway
Defence: do not assume the old 'quantity = supply' presumption automatically applies — under the reformed Code, the prosecution must prove actual purpose. Foreigners arrested with small quantities should expect rehabilitation options to be available in many cases but should still treat any narcotics charge as serious and engage qualified Thai defence counsel immediately.
Cited Statutes
- Code on Narcotics B.E. 2564 (2021)
- Act on Narcotic Drugs (1979) (for pre-2021 conduct)
- Criminal Procedure Code, Section 226/1
This entry summarises a representative line of authority from the Thai Supreme Court (ฎีกา). It is intended for general legal education only and is not a substitute for advice from a Thai-qualified lawyer. Individual Dika case numbers are being verified against primary sources; until then these entries are presented as composite doctrinal summaries.
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