Explain the right of self determination

The right of self determination amounts to an exception in the sense that when fighting for self determination, the state can render assistance from the third country. Moreover, the intervention when used for the purpose of weapon of mass destruction is considered to be lawful. Similarly, if steps taken to rescue someone living abroad, third country's assistance can be acquired and would be regarded as legitimate use of force. So, any methods or means devised or adopted to use force outside the UN Charter are considered to be unlawful and amount to non compliance of international obligations of any state under the UN system.