Regulation 40B under the Defence of the Realm Act made it an offence for anyone but doctors, pharmacists and vets to possess, sell or give away opium, and restricted cocaine to prescription. Indian hemp was not on its list, and the conference that drafted the regulation did not mention it. Its targets were cocaine and opium.[1]
Listed for context. No score change is recorded for United Kingdom here.
References
- Cannabis Britannica: Empire, Trade, and Prohibition, 1800–1928James H. Mills · Oxford University Press · 2003 · pp. 191–192 · ISBN 0-19-924938-5
Checked. The date and the event were compared with a source that was read.