South Korea focused on strengthening financial and maritime sanctions against the reclusive state.
The Prime Minister's Office unveiled the measures on Tuesday with hopes of making the North think twice about its pursuit of weapons of mass destruction.
"North Korea's provocations, like its nuclear and long-range ballistic missile tests, cannot be accepted. North Korea's bad decisions should be corrected by making them pay a heavy price for their actions."
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The new sanctions fall under four main measures.
First, South Korea is blacklisting 40 individuals and 30 organizations.
The individuals on the list include people who have contributed to the North's nuclear weapons development and those who have been involved in its weapons trade.
Secondly, all ships that have stopped at any North Korean port within 180 days will be banned from entering South Korean ports.
This comes on top of other similar maritime sanctions imposed by Japan that also ban North Korean ships.
Third, South Korea will strengthen its monitoring of exports and imports related to North Korea in order to block any of its goods from entering the country through another nation.
To do this, Seoul is going to come up with a product watch list.
Last but not least, South Korean citizens, including those living overseas, are going to be asked to refrain from visiting private North Korean facilities such as North Korean restaurants in China, which are believed to substantial sources of cash for the regime.