Not officially, that I know of. I have worn nice jeans and not been turned away. I would suggest business casual, which is how I would classify most there, and you should be good to go.
Office casual
No dress code, but I won't lie, I would feel out of place with cutoffs and a dirty shirt.
Business casual
No
No, but you'll feel odd if dressed in less than nice jeans and a shirt with a collar.
Thanks! Your answer is awaiting moderation.