Curaçao has been a self-governing nation (except in matters of defence and judicial policy) since October 2010. The Kingdom of the Netherlands remains responsible for defence, but there is a risk that this will strain the relationship between the two nations. The Partido Soberano is a strong proponent of full independence for Curaçao. The Kingdom Council of the Netherlands (the Netherlands ministerial executive, which includes former Dutch colonies) will continue to provide technical support and fiscal oversight. The island's foreign policy will continue to be directed towards achieving a larger role for Curaçao in regional affairs, including developing social and cultural ties with other former colonies of the Netherlands and the implementation of a co-operation agreement signed with Sint Maarten in 2014. The administration will also try to maintain good relations with Venezuela, whose state-owned oil company, PDVSA, has leased the island's Isla refinery until 2019. Relations would be strained were economic and political events in Venezuela to prevent PDVSA from continuing to operate the refinery (so far in 2017 the Venezuelan government has increased orders from the Isla refinery). An increase in illegal immigration from Venezuela, owing to food shortages there, has increased the risk of the Dutch government applying diplomatic pressure on Venezuela.