HD rules vary not only from state to state, but county to county, and even city to city within a county. ( The City and county I grew up in, there is no HD!! Want to build a house or open a raunt? Sketch a general plan of the facility on a scratch pad, show it to the mayor, give him a $10 permit fee and your good to go, no HD or building inspections required, just please do it right!!!) Best bet is to contact the HD in the areas you plan to be selling/cooking. Generally, I think if you are required to have a commercial kitchen, then all cooking has to be done at that kitchen. Your mileage may vary.
Dedicated Stick Burner, Pitmaster @ All About The Q, facebook.com/itsallabouttheq KCBS CBJ