Covered by Beijing-imposed security law in 2020 Covered by colonial-era sedition law

Article 23 of the Basic Law, Hong Kong’s mini-constitution, says the government should enact laws “on its own” to ban any act of treason, secession, sedition, subversion against the central government, or theft of state secrets.

Hong Kong must also prevent foreign political organisations from conducting political activities in the city, and prohibit local political outfits from forming ties with their foreign counterparts.

The government first attempted to introduce the law in 2003, but backed down after a massive public protest.