Data entry notes:
This Treaty has a duration of twenty years. The period of validity is automatically rene wed for five-year unless either of the signing parties forwards a written notice of withdrawal not less than a year before its expiration.; This Treaty has a duration of twenty years. The period of validity is automatically rene wed for five-year unless either of the signing parties forwards a written notice of withdrawal not less than a year before its expiration.; Entry into force from the date of exchange of the instrument of ratification that must be deposited in Beijing.; Article 19 states that the contracting parties must carry out co-operation in the field of protection and improvement of environment, prevention of transborder pollution, just rational use of frontier waters, live biodiversity in the Northern part of the Pacific Ocean and within the basins of frontier rivers. The contracting partie s must undertake joint efforts in the field of protection of rare flora, fauna and ecosystems within transborder areas, and must carry out co-operation in the field of prevention of disasters of environmental and technological kind in both states and liquidation of their consequences.; FAO Descriptors: 110; 706; 712; 238; 360; 247