Competition Car Log Book

[DP1]

A bit of a newbie question here.

I've just bought a competition/track car (Ginetta G20) and am hoping to start racing after doing a few trackdays in it. I thought CSSC, 750 MC that kind of thing.

Should the car have a CCLB or is this not necessary for all cars? If i need one, how do I go about getting one?

Thanks in advance