I'm surprised that there's no mention of an 83(b) election. I'm not a tax expert (hah!) and you might be nervous about giving anything that could be construed as tax advice, but I imagine you could safely say something like:

"While we cannot give tax advice, we strongly suggest that you consider making an 83(b) election when you are initially granted employee stock options. If you choose to make an 83(b) election, you may need to do so within 30 days of joining."

As I understand it, this can be a Big Deal (tm).