decriminalization

The act of making an activity or substance no longer criminalized (no longer a crime, subject to criminal penalties, to perform or possess). (Compare legalization, which often implies regulation.)

the decriminalization of all plant-based psychedelics

Some opponents also said federal decriminalization would contribute to more death and injury from impaired drivers using marijuana.

The act of ceasing to treat a person as a criminal, by making their activities legal or no longer subjecting them to the criminal justice system (but instead possibly the mental healthcare system, etc).

Most sex work feminists support either the legalization or the decriminalization of sex workers.