While the overall strategy has received backing from the Commission, Council and Parliament, the details of the text still need to be hammered out by EU lawmakers.
The contentious issues in the proposal are:
- The Commission's decision not to include international flights in the scheme until one year after intra-EU flights (in 2011), and;
- the level of the cap that airlines will be subject to and the system for distributing allowances.
Representatives of the Parliament, the Commission, aircraft manufacturers and operators debated these issues in a conference on 28 March 2007.



