China confirmed that a proposed national security law would allow Beijing to override Hong Kong’s independent legal system, shedding new light on a move that has stoked tensions with the U.S. and threatens the city’s status as a top financial center.

The proposal said the central government will have jurisdiction over an "extremely small” number of national security cases under "specific circumstances,” according to draft language released on Saturday by the official Xinhua News Agency. It added that China will establish a new bureau in Hong Kong to analyze the security situation, collect intelligence and "lawfully handle national security cases.”

The draft bill also calls for Hong Kong to establish a new committee to protect national security, which will be supervised and accountable to Beijing. The chief executive will oversee the committee, as well as appoint judges to handle criminal cases brought under the law. Authorities in Beijing will have the final say on interpreting the law.