What You are regarding to? Conformity of Production (yes, I wrote it wrong in first post)?
I found it here - dft.gov. uk/vca/vehicletype/conformity-of-produc.asp
Well - fortunately - my instructor has no idea that i own Buick. So it's only about to bring him the elaboration
Buick - Scottish founder with Dutch surname, who opened his Motor Company in USA. Funny
By "trim in" You mean to make it lighter, right?