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 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. The government will focus on implementing a co-operation agreement signed with Sint Maarten in 2014, which was bolstered in August 2017 through a deal on healthcare co-operation with Sint Maarten and Aruba. The administration will also try to maintain good relations with Venezuela; the country's state-owned oil company, PDVSA, has a lease on 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 raised the risk of the Dutch government applying diplomatic pressure on Venezuela.