Consent plays a pivotal role in the development of international law. It can be used as an instrument of protecting the sovereign equality of nations and jealously guard one’s interest (Guzman, 2011). Given the heterogeneous interest of nations, however, it can also be an impediment for the development of international rules (Guzman, 2011). Positive law theorists emphasized that a state must give its consent to be effectively bound by the international law, but the naturalists support the idea that international law can exist without the will of the nations (D’Amato, 2010). State consent has the potential to increasing compliance of nations with international laws and bolster legitimacy or/and constituency, and help to tackle frequent, or rather haphazard deviation from the international obligations.