Article 23
Article 23 is an article of the Hong Kong Basic Law. It states that Hong Kong "shall enact laws on its own to prohibit any act of treason, secession, sedition, subversion against the Central People's Government, or theft of state secrets, to prohibit foreign political organizations or bodies from conducting political activities in the Region, and to prohibit political organizations or bodies of the Region from establishing ties with foreign political organizations or bodies." The first attempt to implement the article was foiled by a massive street protest on 1 July 2003, when a half-million people marched through downtown Hong Kong.