The job description and list of expectations will be different- show up sober with basic tools, properly dressed, and on time are expectations (which IMHO shouldn't need to be said, but well...). The JD will tell them what the work entails (carrying things, cutting pipe to spec, drilling holes as directed, wiring devices, etc). Those are both separate from job site rules, like cell phone usage, smoking locations, where to park, and the like.
One expectation- bring your own lunch unless you can be out, back, and have eaten in the allotted break. I usually pack a lunch because it's cheaper and I can eat at some leisure instead of dashing out for something.