Costa Rica ratified the Protocol amending the Single Convention on Narcotic Drugs on 14 February 1973. The Protocol, adopted in Geneva on 25 March 1972 and in force from 8 August 1975, strengthened the international control board and, among other changes, lets parties provide treatment, education, after-care and rehabilitation for people who use drugs, as an alternative to conviction or punishment or in addition to it.[1]
Listed for context. No score change is recorded for Costa Rica here.
References
Checked. The date and the event were compared with a source that was read.