"The speed and secrecy with which China has pushed through this legislation intensifies the fear that Beijing has calculatingly created a weapon of repression to be used against government critics, including people who are merely expressing their views or protesting peacefully", Rosenzweig said in a statement.
Secretary of State Mike Pompeo onsaid the USA would stop exporting sensitive military items to Hong Kong, following his announcementthat Washington was imposing visa restrictions on current and former Chinese Communist Party members believed to be responsible for undermining Hong Kong's promised autonomy and traditional freedoms.
The law has fueled a widening divide between China and the United States and some other countries over the future of Hong Kong, a semi-autonomous Chinese territory with its own laws and government institutions.
The new law was met by waves of protests and condemnation from the United States.
Hong Kong leader Carrie Lam said on Tuesday that this will have minimal impact on the city.
The precise wording of the security law remains secret, but China has said it will outlaw subversion, secession, terrorism and collusion with foreign forces.
"China promised that Hong Kong would remain unchanged for 50 years". Its chief executive will most likely have the right to appoint judges for the hearings of the national security cases.
It is still unclear which specific activities are to be made illegal, how precisely they are defined or what punishment they carry.
Chan said the march on Wednesday will be held under the theme of opposing Beijing's national security law, as well as continuing the push for protesters' five demands-which includes universal suffrage and an independent inquiry into instances of police violence against protesters and journalists in the past year.
Norbert Röttgen, a senior German CDU member, condemned "the complete lack of transparency" in the new Hong Kong law - which has not been published in full - and said 1 July marked the day "one country, two systems" no longer exists.
There was no formal announcement from Beijing on the passage of the law.
The change in Hong Kong's eligibility for controlled defense exports, however, is a more serious substantive change to the nature of the United States' special relationship with the Chinese territory.
The EU Commission President said the EU is "seriously concerned" about the law, which "does not conform with Hong Kong's Basic Law or China's worldwide commitments".
In an unprecedented move, Beijing bypassed Hong Kong's legislature to pass the law, which was signed off just six weeks after it was first announced.
"We will continue to work with the countries involved to deal with this issue appropriately", Chief Cabinet Secretary Yoshihide Suga told a news conference when asked about reports that China's parliament had passed the law on Tuesday. China had to make a decision as a matter of national security, he stressed.
An EU-China Summit set for September has been postponed due to the coronavirus pandemic, but the German foreign minister, Heiko Maas, said it needed to be quickly rescheduled and it was essential that the EU spoke with one voice on China.
"We hope Hong Kong people continue to adhere to the freedom, democracy and human rights that they cherish", she told reporters.