I'm REALLY sorry to hear that Simon. Unfortunately, those laws DO exist although not strictly enforced. It says only two reptiles per dwelling, no snakes over 24", and no lizards over 12".
You should feel fortunate that he only gave you warning. My guess is, that once he saw that you keep your snakes in excellent conditions, decided not to push the matter but only make you aware of the laws. IMO, I wouldn't raise a stink.
"Do not conform any longer to the pattern of this world, but be transformed by the renewing of your mind."