The Supreme Court of India, in its judgment dated April 17, 2025, in Directorate of Revenue Intelligence v. Raj Kumar Arora & Ors. (Criminal Appeal Nos. 1319 of 2013 and 272 of 2014), addressed critical issues concerning the applicability of the Narcotic Drugs and Psychotropic Substances Act, 1985 (NDPS Act) to psychotropic substances listed in the Schedule to the Act but not in Schedule I of the NDPS Rules, 1985. The case also examined the retrospective applicability of the Court's decision in Sanjeev V. Deshpande (2014) and the scope of Section 216 of the Code of Criminal Procedure, 1973 (CrPC) regarding alteration of charges. This analysis is tailored for legal practitioners to understand the judgment's implications, legal reasoning, and practical applications. Factual Background The appeals arose from two separate incidents involving the seizure of Buprenorphine Hydrochloride, a psychotropic substance listed in the Schedule to the NDPS Act but absent from Schedule I of...