Jainah, Z.O., Ramadan, S. , Ningrum, I.P.Y.C. and Anggara, F.F. 2026. The Legal Certainty in the Application of Sanctions for the Abuse of Narcotics Class I Not Derived from Plants Based on the Principle of Justice (A Study of Decision Number: 528/Pid.Sus/2025/PN Tjk). TOFEDU: The Future of Education Journal. 5, 1 (Jan. 2026), 651–659. DOI:https://doi.org/10.61445/tofedu.v5i1.1544.