Hong Kong votes to ban possession of the cannabis plant

Hong Kong’s lawmakers voted on 5 April 1928 to prohibit possession of the cannabis plant or any part of it. Medicinal tincture made from cannabis would come under dangerous-drug controls. The colonial government was responding to an international drug treaty, while choosing a broader possession ban at home.

A treaty brought cannabis into the debate

Hong Kong already had a dangerous-drug law dating from 1923. The government wanted to amend it to meet the 1925 Geneva Convention, which had added Indian hemp to international drug controls.

Attorney General Sir Joseph Horsford Kemp introduced the changes. He told legislators that some existing rules already met the treaty’s requirements, while others needed tightening. The government also planned to bring its drug regulations into line with those used in England.

Kemp presented the bill as part of a wider effort to close gaps in control over dangerous drugs. Cannabis was the important addition he singled out when explaining why the law needed to change.

The government wanted the plant prohibited

Kemp said Hong Kong would go “even further than the Convention” by prohibiting possession of the plant and all its parts. For someone holding cannabis, that meant the proposed restriction reached the material itself, beyond controls on particular forms of drug commerce.

He drew a separate line for medicinal tincture. Because that preparation was used as medicine, it would enter the dangerous-drug list, while the plant would be prohibited. The government’s plan therefore distinguished a cannabis medicine from possession of the plant from which it came.

Drug traders faced tighter border rules too

The bill also widened the meaning of importing and exporting drugs. The government wanted the rules to cover air transport and drugs carried through the post in transit.

Its explanation even considered a packet thrown across the land frontier. Words dealing only with carriage might leave room for an argument that such an act escaped the law, so the government proposed broader wording. These examples show the practical border problems officials wanted the drug law to reach, alongside the new cannabis controls.

The vote carried the government’s plan through

The Legislative Council passed the bill without changing it. Kemp moved its passage and the Colonial Secretary supported it, carrying the government’s proposed cannabis distinction through the legislature.

Four decades later, Hong Kong adopted a replacement drug law. That government argued for harsher treatment of traffickers and greater leniency toward people possessing drugs for personal consumption. Cannabis remained controlled as Hong Kong’s drug policy developed around the different treatment of suppliers and users.^[1][2][3]