"If we don't get these additional sanctions at the United Nations", he said, "I have an executive order prepared to go to the president that will authorize to stop doing trade and put sanctions on anybody that does trade with North Korea".
The resolution, adopted in response to Pyongyang's sixth and strongest nuclear test explosion, bans North Korea from importing all natural gas liquids and condensates. It also bans North Korean exports of textiles, a $726 million industry, and phases out North Korea's overseas labor program, which sends 93,000 North Koreans abroad to work in near slave conditions and send their pay back to the regime.
Mr Rycroft called the resolution "a very significant set of additional sanctions", declaring "we are tightening the screw, and we stand prepared to tighten it further".
US Ambassador Nikki Haley said the tough new measures were a message to Pyongyang that "the world will never accept a nuclear-armed North Korea", but she also held out the prospect of a peaceful resolution to the crisis.
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Photo Bridges over the Yalu River connecting North Korea and China.
The United States and its allies argue that tougher sanctions will pile pressure on Kim's regime to come to the negotiating table to discuss an end to its nuclear and missile tests.
U.S. Treasury Secretary Steven Mnuchin told a conference earlier on Tuesday that if China did not follow through on the new sanctions, "we will put additional sanctions on them and prevent them from accessing the U.S. and global dollar system".
The Democratic People's Republic of Korea (DPRK) is "ready to use a form of ultimate means", Mr Han said, without elaborating.
Assistant Secretary of the Treasury for Terrorism and Financial Intelligence Marshall Billingslea testifies during a House Foreign Affairs Committee hearing on North Korea sanctions on Capitol Hill in Washington.
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"Add to that the ties between North Korean operators and a watering hole compromise of a bitcoin news site in 2016, as well as at least one instance of usage of a surreptitious cryptocurrency miner, and we begin to see a picture of North Korean interest in cryptocurrencies", FireEye researcher Luke McNamara wrote in a blog post published Monday (11 September).
After a meeting of the 28 European Union foreign ministers in Tallinn last week, Mogherini said work would begin on new measures against the North to add to the broad range of sanctions the bloc already has in place.
Republican Rep. Ed Royce, the committee chairman, said United States and allied efforts should be "super-charged".
The resolution fell short of measures sought by the Trump administration.
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