Fernando Alonso has become the latest driver to express a preference for his driver number for the 2014 season.
Another new ruling for next year sees drivers having a more personal number on their cars and helmets to help fans identify the cars on the track more easily as well as to maximise merchandising opportunities.
The No. 1 is reserved for the world champion, should he wish to use it, with Alonso saying he will use the No. 14.
According to Eurosport, he told reporters in Madrid:
I will use 14. It has been my lucky number since 1996, when, while I was 14, on July 14 and with kart number 14 I won the world championship. Since then I have always used 14. Hopefully it will be lucky next year.
Several other drivers have also submitted their number preferences, with new teammate Kimi Raikkonen choosing No. 7, Felipe Massa No. 19 and Williams teammate Valtteri Bottas No. 77.
Sergio Perez has opted for No. 11, Nico Rosberg No. 5, No. 6 or No. 8, and Jean-Eric Vergne No. 21, No. 25 or No. 27.