Section 17: General provisions apply to other laws
Statutory text (Thai original)
บทบัญญัติในภาค ๑ แห่งประมวลกฎหมายนี้ ให้ใช้ในกรณีแห่งความผิดตามกฎหมายอื่นด้วย เว้นแต่กฎหมายนั้น ๆ จะได้บัญญัติไว้เป็นอย่างอื่น
English translation
The provisions in Book 1 of this Code shall also apply to offenses under other laws, unless those laws provide otherwise.
This English translation is provided for reference only and has not yet been firm-verified. Always rely on the Thai original.
Firm annotation
Section 17 is the bridge that extends the general part of the Penal Code (Book 1) to the entire body of Thai criminal legislation, from the Narcotics laws to traffic, forestry, tax and other regulatory offenses. Its effect is a default rule: unless a special statute displaces a Book 1 principle, that principle applies. The Supreme Court has relied on it to apply Penal Code doctrines that special statutes are silent on, notably the recidivism enhancement in Sections 92 and 93, to repeat offenders under the drug laws. The saving clause 'unless those laws provide otherwise' preserves the primacy of any contrary special provision.
Why this matters in practice
This section matters most to people charged under specialty statutes: even where a drug, traffic or regulatory law is silent, general Penal Code rules such as attempt, self-defense, mitigation and recidivism enhancement can still apply and change your exposure. For repeat drug offenders in particular, the courts have used Section 17 to add a recidivism enhancement the drug law itself does not mention. See our overview of Thailand drug laws and penalties.
Supreme Court decisions interpreting this section
-
Supreme Court Judgment No. 1856/2567 (2024)
Because Section 17 extends the Penal Code's general provisions to offenses under other laws, a repeat offender under the drug legislation may still have the penalty increased under the Penal Code even though the special drug law contains no recidivism provision.
The former recidivism enhancement under the old drug law had been repealed and the new law contained none. The Court reasoned that, since Section 17 makes the Penal Code's general provisions applicable to offenses under other laws, the absence of a recidivism clause in the special drug law does not bar the court from increasing the penalty under the Penal Code's general recidivism rules where the defendant reoffends without reform.
-
Supreme Court Judgment No. 3374/2566 (2023)
Section 17 allows the Penal Code's general recidivism enhancement to be applied to a repeat drug offender even though the special narcotics statute itself provides no recidivism enhancement.
The Court noted that neither the repealed law in force at the time of the offense nor the later law provided for a recidivism enhancement, so a straight enhancement could be heavier than the later statute allows and warranted re-fixing of the penalty. Even so, because Section 17 carries the Penal Code's general provisions into offenses under other laws, the silence of the special drug statute does not prevent the court from applying the general recidivism enhancement.
Curated decisions with case numbers verified against the Supreme Court database. English renderings are the firm's editorial translation for study.
Cited in 76 Supreme Court decisions (1959 to 2025)
Selected citing decisions
- Decision 1351/2567 (2024)
- Decision 9960/2559 (2016)
- Decision 6664/2559 (2016)
- Decision 5958/2559 (2016)
- Decision 2920/2554 (2011)
- Decision 7122/2553 (2010)
- Decision 595/2551 (2008)
- Decision 5509/2549 (2006)
This list is selected automatically, weighted towards judgments that turn on this section rather than ones that merely recite it when passing sentence. It has not yet been reviewed by the firm.
Most often cited alongside
- Section 29 32
- Section 30 32
- Section 78 29
- Section 83 25
- Section 91 25
- Section 33 21
Sections that appear in the same judgments as this one most often. The figure is the number of decisions.
Counted across the firm's corpus of 83,652 Supreme Court decisions, 1921 to 2026. The count is complete; the stated year range trims rare outliers so it describes where the citations actually sit. These figures are computed by us and are not official court statistics. How we count these, and what we measured
Frequently asked questions
Do Penal Code general rules apply to drug or traffic offenses?
Yes. Under Section 17, the general provisions in Book 1 apply to offenses under other laws, such as the drug and traffic laws, unless that specific law provides otherwise.
Can a court add a recidivism penalty where a special law is silent?
The Supreme Court has held that Section 17 allows the Penal Code recidivism enhancement in Sections 92 and 93 to be applied to repeat offenders even where the special statute does not mention it.
Related guides on ThaiLawOnline
Cite this section
-
Plain citation
Penal Code, s. 17 (Thailand) -
Academic citation
Penal Code (Thailand), s. 17. ThaiLawOnline, https://www.thailawonline.com/thai-penal-code/section-17/ (accessed 17 August 2026). -
Thai citation
ป.อ. มาตรา 17 -
Permalink
https://www.thailawonline.com/thai-penal-code/section-17/ -
Embed on your site
<blockquote cite="https://www.thailawonline.com/thai-penal-code/section-17/"><p>The provisions in Book 1 of this Code shall also apply to offenses under other laws, unless those laws provide otherwise.</p><footer>Penal Code, s. 17 (Thailand) — <a href="https://www.thailawonline.com/thai-penal-code/section-17/">ThaiLawOnline</a></footer></blockquote>
The Thai text is authoritative. The English is an unofficial translation by ThaiLawOnline, free to reuse with attribution.