Sharing a kitchen

Just looking for some thoughts on this, as I've recently come across this situation. A facility in my area, licensed as a restaurant, allows their kitchen to be utilized after hours by a separate, unlicensed couple to cook and package foods for sale at cafes around town. (Breads, pastries, etc.,) What are the requirements? A separate commissary license? Catering? Dept. of Ag? Thank you!