The sanctions on North Korea are really extreme.
They are not allowed to export any of their major exports including minerals, wood, food, machinery, textiles. North Korean workers are supposed to be denied work visas so they cannot repatriate any money to North Korea. And they are limited to importing 500,000 barrels of refined petroleum a year. They are not allowed to buy LNG. They are also not allowed to either buy heavy weapons or luxury goods.
All because of them developing nuclear weapons. Which Pakistan and India also did without getting sanctioned like this.
Unlike the Iranian sanctions, the North Korean sanctions do not have an expiration date. Good luck convincing the US, France, and the UK to vote to repeal the sanctions. The way Russia has been torpedoing the sanctions is by simply not allowing any UN inspectors to come into office, so the sanctions cannot be enforced.