All new Maxi-Cosi car seats comply with the most recent ECE R44/04 standard. A white and orange sticker has been affixed to the back or bottom of your Maxi-Cosi product. The orange section shows the code ECE R44/04, the last 2 number of which indicate the version. On older models, this can be seen by the ‘approval number’ under the small circle on the sticker. This approval number starts with 03 or 04, which stands for the ECE R44/03 and ECE R44/04 standard.