Hello Mohamed:
I think Santiago got your question wrong as you did not explained yourself. He is talking about the FRDM-KL25Z board in general as a development board. His answer has nothing to do with the Freescale Cup's rules. From your last comment ("race car") I assume you are participating in Freescale Cup. All the regarding information can be found in the next dedicated community page:
The Freescale Cup Knowledge Center
And if you do not find your answers already posted, at the bottom of that same page you will find links to specific region teams, so you can post all your new questions in there.
Hope my reply helps clarifying.
Regards!
Jorge Gonzalez