I have shipped to Alaska many times.
Not sure what restrictions you are asking about...I have never had any issues. There are no restrictions for Ball Pythons.
Perhaps you could be more specific about the type of restrictions you are concerned about. Example: Venomous Restrictions, Size Restrictions or Species Restrictions etc.
Please feel welcome to contact me if you have questions.
Provided the shipment is packed correctly, for the existing conditions, it should be fine. I prefer to make my own styrene lined boxes, as I can utilize thicker "blue" styrene and make it fit nice and tight.
Also, do not skimp on the heat packs. Select quality 40 hr heat packs. This will help you to avoid catastrophe if there is a delay during transit. And keep an eye on the projected temps for the specific destination zip code PRIOR to shipping the package. Then you will have a better idea of how to properly pack the box.
Here is a great exercise for anyone who is concerned about shipping in cold/hot weather.
Pack a box with a temperature data logger inside the box and one outside the box. Subject the box to various temperature settings for specified time frames. Study the temperature histories recorded on the data loggers.
This will help you to learn to pack a box for nearly any conditions.
You can usually find fairly cheap (yet accurate) data loggers online or at a decent electronics store.
With a little experimentation...you will be surprised what you may learn. It's kinda fun to go "MAD SCIENTIST" too. lol.
Harlin Wall - WALL TO WALL REPTILES!
970-255-9255