The provision
Narcotic Drugs and Psychotropic Substances Act, 1985 — Section 64A
A person who is dependent, and who is charged with using, or with an offence involving a small quantity, and who volunteers for de‑addiction treatment at a hospital or institution run or recognised by the Government or a local authority, and who goes through with that treatment, is not liable to be prosecuted for it.
That is a plain restatement, not the law itself. The operative text is the English of the Act, quoted in full on the sources page. If anything here differs from the Act, the Act is what is true.
