Harry Kazianis, director of defense studies at the Center for the National Interest in Washington, said there is a good chance that part of the proceeds from doing business with North Korea will be funneled into its nuclear and missile programs. The council also froze the assets of three additional entities: the Central Military Commission, the powerful Organization and Guidance Department that directs key personnel appointments and the Propaganda and Agitation Department, which oversees the North's media and its censorship.
The ministry lambasted the latest resolution, calling it a "heinous provocation aimed at depriving the DPRK of its legitimate right for self-defence and completely suffocating its state and people through full-scale economic blockade".
House Foreign Affairs Committee Chairman Ed Royce urged Secretary of State Rex Tillerson and Defense Secretary James Mattis last week to step up the imposition of USA sanctions on Chinese entities that help enable North Korea's illicit activities, according to a column carried in the Monday edition of The Washington Post.
That launch was followed by a nuclear test on September 3, its largest to date, which Pyongyang said was a hydrogen bomb small enough to fit onto a missile. "I don't know if it has any impact, but certainly it was nice to get a 15 to nothing vote".
The Security Council stopped short of imposing a total oil import ban, freezing the assets of leader Kim Jong Un or slapping him with a travel ban, as the Trump administration initially wanted.
Russian Federation and China have also expressed concern about the humanitarian impact of strengthening sanctions on North Korea.
Another senior administration official told Reuters news agency that any such "secondary sanctions" on Chinese banks and other companies were on hold for now to give China time to show it was prepared to fully enforce the latest and previous rounds of sanctions.
The South Korean Foreign Ministry in a statement also lauded the adoption of UNSC Resolution 2375 as a response to the Pyongyang's latest nuclear test, which it said "showed the strong will of the worldwide community that it will not allow North Korea's reckless and irresponsible nuclear weapons development, a serious provocation to global peace and security".
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.
"Today we are saying the world will never accept a nuclear armed North Korea", she said.