Delaware Law requires permits for exotic pets, with a list of exempted pets maintained by the state's veterinarian office. Sugar Gliders are exempt.

Delaware Exotic Pet Law
Updated as of 11/1/09

The exempt pet list is embedded in the following document under section 6.1. If you search "sugar glider" it will bring you to the list showing that sugar gliders are exempt from the permitting requirement in the State of Delaware.

Exempt Exotic Pet List

This policy is currently under revision. The policies listed above are as proposed. The sections impacting sugar glider ownership and exempt status are not changing from what I can tell.

This took me a while to track down before I got Lilo, so I figured I would share in case anyone else was looking for this.