Here is the links to the University of Idaho and its rules/regs/student conduct. Now if this applies to non students I am not sure. Hope this helps. You can look up any University/College rules/regs etc by going to that U/C web site.
University Of Idaho http://www.uidaho.edu/apm/35/35
H. Weapons and Explosives.
a. "Firearm" means any instrument used in the propulsion of shot, shell, or bullets, or other harmful objects by the action of gunpowder exploded within it, by the action of compressed air within it, by the power of springs and including what are commonly known as air rifles, BB guns, and pellet guns.
b. Firearms are prohibited on university property except in the following situations:
i) University Students are permitted to bring firearms onto university property only under the conditions set forth in the Student Code of Conduct, Article VI. [ed. 7-10]
ii) For persons residing in University of Idaho-operated housing, including Residence Halls and Apartments, firearm storage is available at the Police Campus Substation. Firearms must be unloaded, encased, and have a trigger lock attached or be otherwise rendered inoperable. Persons residing in University-operated housing who wish to store firearms at the Police Campus Substation should contact the Police Campus Substation at (208) 885-7074, for additional information. Firearms are not permitted in or around University-operated housing.
iii) Firearms may be brought onto campus for use in the Memorial Gym firing range in accordance with firing range rules. Firearms must be transported to the range unloaded, encased, with a trigger lock attached or otherwise rendered inoperable.
iv) Firearms carried by law enforcement personnel and on-duty armored transport personnel are allowed on campus.
v) The Director of Environmental Health and Safety may, in his or her discretion, grant written authorization for individuals to bring firearms on university property for specific events and purposes.
c. Holding a concealed weapons permit does not give an individual permission to bring a firearm onto university property.
STUDENT CODE OF CONDUCT
ARTICLE VI--PHYSICAL SAFETY AND WELFARE. [section renumbered 8-07]
9. Firearms also may endanger the safety of the university community when improperly handled. "Firearms" as used in the code means any instrument used in the propulsion of shot, shell, or bullets, or other harmful objects by the action of gunpowder exploded within it, by the action of compressed air within it, by the power of springs and including what are commonly known as air rifles, BB guns, and pellet guns.
10. No firearm may be brought onto campus unless it is encased and has a trigger lock attached. ("Encased" is defined as placing a gun with a trigger lock in some sort of container--hard or soft, and including, but not limited to, such materials as aluminum, plastic, wood, leather, and cloth--that is fastened by means of a snap lock, zipper, tie, etc.).
11. In UI residence halls firearms must be kept in an area authorized by the Housing Office.
12. Loaded guns are not permitted on campus. A "loaded gun" is defined as one containing live ammunition either in the chamber or in the magazine. Possession and storage of gunpowder must comply with federal, state, and municipal laws. No ammunition will be allowed on campus except that designated for firearms that are properly stored on campus.
13. Other explosive substances are also prohibited on campus, except as approved by the safety officer. Exceptions to the above may be made for supervised UI courses.
14. Unauthorized uses of dangerous projectile or explosive devices, including but not limited to sling shots, crossbows, catapults, and devices which cause dangerous chemical reactions, are violations of this code.