LLLI has just published an excerpt from Milk Matters, dealing with the legal issues surrounding early neonatal exposure to foods other than breastmilk. You can link to it via this address:
https://leadertoday.breastfeedingtoday-llli.org/milk-matters-infant-feeding-and-immune-disorder/
This is based on Australian law, and was OKed by an experienced lawyer. Think about the issues and contact me with any extra information relating to your context.