It is stated in the Sino-British Joint Declaration that "The [HKSAR] will be vested with executive, legislative and independent judicial power, including that o

It is stated in the Sino-British Joint Declaration that "The [HKSAR] will be vested with executive, legislative and independent judicial power, including that of final adjudication." [1] So it's unclear how this can be legally imposed unilaterally on Hong Kong. That said, the proposed law appears to be one which the HK legislature is required to pass under Article 23 of the Basic Law, which states "The Hong Kong Special Administrative Region 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 organisations or bodies from conducting political activities in the Region, and to prohibit political organisations or bodies of the Region from establishing ties with foreign political organisations or bodies." [2] [1] https://en.wikipedia.org/wiki/Sino-British_Joint_Declaration https://en.wikipedia.org/wiki/Sino-British_Joint_Declaration [2] https://en.wikipedia.org/wiki/Hong_Kong_Basic_Law_Article_23 https://en.wikipedia.org/wiki/Hong_Kong_Basic_Law_Article_23