I'm an engineer. I get points for shaving or taking a shower.
I work from home most of the time. When I do go in, it's funny because I work in a field office which is full of sales people who are dressed like, well, sales people. They look at me and right away ask what I am working on. They can tell I'm an engineer from my T-shirt and jeans.
Engineers are a different breed. I think we tend to ignore those that think they need to dress to impress. Most of the vendors visiting our office are wearing dockers and polo's these days. 10years ago the sales guys were all suits but that has changed.
Pretty casual clothing requirements here. No one seems to push clothing boundaries so regulations are not mentioned. I imagine they are codified somewhere but most employees would not be able to tell you what the rules are. Jeans or dockers and polo's or t-shirts are the norm.
Craig