Mr Jack, the Jewish laws had not been given yet.
Is that so? Then how was it that Noah was able to distinguish between the clean, and unclean, animals so that he could get the correct number of each on the ark? Did clean and unclean have a different meaning to those he could eat, and those he could not?
Genesis 7:2 "Of every clean beast thou shalt take to thee by sevens, the male and his female: and of beasts that are not clean by two, the male and his female." - King James Version