I'm starting a new job soon, and I got an email from HR about the dress code. They said that the dress code consists of blue jeans or any color khaki pants, a button down or polo shirt, and no tennis shoes. I'm kind of confused by what exactly that means, since that is the only thing they said about what type of shoe you can wear.
What does that generally mean in the context of a Work Dress Code? Does it mean I should only wear dress shoes, or is there something in particular that is wrong about sneakers / tennis shoes, and that wearing some sort of boot would also be good?
Are there any good ways to deal with this uncertainty?