The Polar Code, establishing mandatory provisions to ensure ship safety and prevent environmental pollution in both Arctic and Antarctic waters, which was adopted at IMO and will enter into force on 1 January 2017. To further strengthen the legal framework relating to ship-source air pollution and the reduction of greenhouse gas (GHG) emissions from international shipping, several regulatory measures were also adopted at IMO and the third IMO GHG Study 2014 was finalized. In addition, guidelines for the development of the Inventory of Hazardous Materials required under the 2010 International Convention on Liability and Compensation for Damage in Connection with the Carriage of Hazardous and Noxious Substances by Sea (HNS Convention) were adopted, and further progress was made with respect to measures helping to prevent and combat pollution of the sea from oil and other harmful substances. Continued enhancements were made to regulatory measures in the field of maritime and supply chain security and their implementation, including the issuance of a new version of the WCO SAFE Framework in June 2015, which includes a new pillar 3 "Customs-to-other government and inter-government agencies". As regards suppression of piracy and armed robbery, an issue considered in some detail in a recent two-part report on maritime piracy prepared by UNCTAD, positive developments were noted, however, concerns remain about the seafarers still being held hostage.