The international aviation emissions (ETS) ‘stop the clock’ legislation was a temporary derogation from the provisions of the Emissions Trading Standards Directive 2003/87/EC in order to facilitate progress at international level towards a global market-based measure (MBM) for aviation emissions. A new Commission proposal takes an airspace approach to the issue, under which only a specific proportion of emissions (no more than 12nM outside the European Economic Area) from flights to and from non-EU countries are covered, starting in 2014, while ‘stop the clock’ legislation is extended for another year. Flights within the EEA are fully covered.