She did say that once the law is passed, "the Hong Kong government will announce it and promulgate it for implementation here, and then I and my senior officials will do our best to respond to everyone's questions, especially regarding the enforcement of this national law."
The legislation is aimed at curbing subversive, secessionist and terrorist activities, as well as foreign intervention in the city's affairs. It follows months of anti-government protests that at times descended into violence in Hong Kong last year.
Prominent Hong Kong pro-democracy activist Joshua Wong, as well as Agnes Chow and Nathan Law, issued statements on Facebook indicating that they would withdraw from pro-democracy organisation Demosisto.
Wong said "worrying about life and safety" has become a real issue and that nobody will be able to predict the repercussions of the law, whether it is being extradited to China or facing jail terms of 10 years or more.
Over a hundred protesters gathered at a luxury mall in Hong Kong's Central business district, chanting slogans including "Free Hong Kong, Revolution Now," with several holding up a "Hong Kong Independence" flag as well as posters condemning the national security law.
Police later cordoned off different areas of the mall, including the atrium, detaining and searching several protesters.
The law has met with strong opposition within Hong Kong and condemnation from former colonial ruler Britain, the US, the European Union and others.
Human rights groups have warned the law could target opposition politicians seen as insufficiently loyal to Beijing for arrest or disqualification from running in September elections for the Legislative Council.
Ahead of the announcement, the Trump administration said Monday it will bar defence exports to Hong Kong and will soon require licenses for the sale of items to Hong Kong that have both civilian and military uses.
The administration has warned for weeks that if the law was passed, it would take action to end special US trade and commercial preferences Hong Kong had enjoyed since reverting to Chinese rule in 1997.
"The United States is forced to take this action to protect US national security," Secretary of State Mike Pompeo said in a statement. "We can no longer distinguish between the export of controlled items to Hong Kong or to mainland China. We cannot risk these items falling into the hands of the People's Liberation Army, whose primary purpose is to uphold the dictatorship of the (ruling Communist Party) by any means necessary."
The US Senate on Thursday unanimously approved a bill to impose sanctions on businesses and individuals — including the police — that undermine Hong Kong's autonomy or restrict freedoms promised to the city's residents.
Britain says it could offer residency and possible citizenship to around 3 million of Hong Kong's 7.5 million people.
China has denounced all such moves as gross interference in its internal affairs and foreign ministry spokesperson Zhao Lijian on Monday said Beijing has decided to retaliate with visa restrictions on "US personnel who perform badly on Hong Kong related issues."
"The US side's attempt to obstruct China from promoting Hong Kong's national security legislation through the so-called sanctions will never succeed," Zhao told reporters at a daily briefing.
China decided to use the National People's Congress to enact the legislation after opposition within Hong Kong's Legislative Council and within society as a whole made it impossible to pass at the local level.
The law is seen as the most significant erosion to date of Hong Kong's British-style rule of law and high degree of autonomy that China promised Hong Kong would enjoy at least through 2047 under the "one country, two systems" framework.
Passage of the legislation will also allow the central government in Beijing also would set up a national security office in Hong Kong to collect and analyse intelligence and deal with criminal cases related to national security.
- AP