eachdayisremarkable
i just posted this for someone else. you need to find a reputable person. they will know the laws, be reasonably priced and help you out. my fave is jennifersjewels here on etsy. she is the best. if you stick to working with only cotton and approved sources for your notions, i.e. snaps, buttons etc., you will not have to test your final product.
here is what i had to say about it.
i use a local etsian and i have her leave a spot for a date and batch number. at staples i purchased a little stamp maker (comes with a bunch of rubber numbers and letters) and at michaels i purchased archival ink (permanent and works great on satin labels, no bleeding). works great and looks professional. i used JennifersJewels here on etsy. she is fabulous. i invested 25 for the stamp set and 10 for a 4" by 6" ink pad, that i probably will never use up. the labels vary, but she is VERY reasonable and EXTREMELY knowledgeable about exactly what needs to be on the labels. hope this helps. because a small investment now will save you thousands in fines later.