Britain’s foreign secretary said Wednesday China’s new national security law for Hong Kong “is a clear and serious violation” of the Sino-British Joint Declaration, the agreement that paved the way for the former British colony’s handover to Chinese rule 23 years ago. Foreign Secretary Dominic Raab told reporters that officials have carefully assessed the contents of the new law since it was published late Tuesday. The 1984 treaty was supposed to guarantee at least 50 years of Western-style rule of law and civil liberties for Hong Kong under a “One Country, Two Systems” principle until 2047.