Two types of permits are available: a permit to possess a single animal, and a permit for multiple animals (necessary for captive breeding). Permits are renewed on a yearly basis, for a small fee (per permit, not per animal). Permits are relatively easy to obtain for animals that are captive-bred (if they aren't already exempt) except in the case of venomous species. For rare, imported, or endangered animals, permits are issued on a case-by-case basis; if you want to work with an endangered species for example, it helps if you have a lot of experience with related, non-threatened, species. A number of members of the New England Herpetological Society possess permits for many different animals. Ask around at a meeting for more information if you are interested.