Hong Kong legislators have approved a government proposal banning local ivory trading in the Chinese territory by 2021.
Legislators voted in favour of amending the existing law to outlaw sales of ivory in Hong Kong, which researchers say is the world's biggest retail ivory market.
The proposal also includes significantly stiffer penalties for wildlife smuggling to deter black market sales.
Under the new law, the maximum sentence will increase to a 10 million Hong Kong dollar (€1,031,000) fine or 10 years in prison, up from the current top penalty of two years.
Wildlife activists applauded the move, even as Hong Kong moves more slowly on the issue than Beijing.
Mainland China banned ivory sales at the start of the year after shutting all carving factories and shops last March.