a bit of info,
https://www.legis.nd.gov/cencode/t62-1.html
I did not find anything regarding unloaded and no mention of a case. That may be in the NDGF rules and like said previously, it could be Bismark specific.
62.1-02-10. Carrying loaded firearm in certain vehicles prohibited - Penalty - Exceptions.
An individual may not keep or carry a loaded firearm in or on any motor vehicle, including an off-highway vehicle or snowmobile in this state. An individual violating this section is guilty of a class B misdemeanor. This prohibition does not apply to:
1. A member of the armed forces of the United States or national guard, organized reserves, state defense forces, or state guard organizations while possessing the firearm issued to the member by the organization and while on official duty.
2. A law enforcement officer.
3. An individual possessing a valid concealed weapons license from this state or who has reciprocity under section 62.1-04-03.1 with a handgun, or with a rifle or shotgun if not in the field hunting or trapping.
4. An individual in the field engaged in lawful hunting or trapping of nongame species or fur-bearing animals.
5. A security guard or private investigator properly licensed to carry firearms.
6. An individual possessing a valid special permit issued pursuant to section 20.1-02-05.
62.1-02-10.1. Carrying a loaded firearm in vehicle while hunting - Penalty.
An individual who is in the field engaged in the lawful hunting of big game or small game and who violates section 62.1-02-10 is not subject to a criminal penalty but is guilty of a class 2 noncriminal offense under chapter 20.1-01.
CHAPTER 62.1-03 HANDGUNS
62.1-03-01. Carrying handgun - Restrictions - Exceptions.
1. A handgun may not be carried unless by an individual not otherwise prohibited and if: a. Between the hours of one hour before sunrise and one hour after sunset, the handgun is unloaded and either in plain view or secured. b. Between the hours of one hour after sunset and one hour before sunrise, the handgun is unloaded and secured.