The Enkei's are 16x7" w/a 42mm offset and the rubber is the same as comes on the Cooper S w/16" wheels. I would be interested to hear what he has to say if you don't mind.
Wouldn't I just have to demonstrate that you could order the Cooper base in 195/65R16 and that would be the end of it (assuming my offset is within 7mm of stock)?
I'm going for simplicity here. I don't want to class up over something so trivial (I've seen this with BMWCCA too) and I don't want to change my wheels on weekends that I want to compete.