So, if you hire the plumber and the plumber comes in to do work in your prep room, they need, your plan covers them too and so they need to be aware of what's expected, what they're supposed to wear as far as personal protective equipment and how you do that, typically what most places do is they will bring in their contractor hire before they even hire them, talk to them, give them the written hazardous communication plan, have them sign off saying, yes, we're going to follow these procedures in this plan and then, you know, workers comp and those other things talk about covering contractor workers if they're injured on the job at your place. 