Autos are legal. However, they are considered a dangerous weapon. So if you are carrying one, you must have a CCW.
I love my OTF Microtech
Spring assist? Might be considered a "gravity knife"
""Dangerous weapon" includes any switchblade or gravity knife, machete, scimitar,
stiletto, sword, dagger, or knife with a blade of five inches [12.7 centimeters] or
more; any throwing star, nunchaku, or other martial arts weapon; any billy, blackjack,
sap, bludgeon, cudgel, metal knuckles, or sand club; any slungshot; any bow and
arrow, crossbow, or spear; any stun gun; any weapon that will expel, or is readily
capable of expelling, a projectile by the action of a spring, compressed air, or
compressed gas including any such weapon, loaded or unloaded, commonly
referred to as a BB gun, air rifle, or CO2 gun; and any projector of a bomb or any
object containing or capable of producing and emitting any noxious liquid, gas, or
substance."
Also going to want to keep away from a liquor esablishment while carrying an auto.
Here's a good place for ND weapon laws....the century code
http://www.legis.nd.gov/cencode/t621.html