Found this in UD Code of Conduct.
Prohibited Activities
Specific violations of this policy include, but are not limited to, the possession, use or threat of use of any of the following items on campus:
Any firearm (including any weapon or instrument from which a shot, projectile, or other object may be discharged by force, whether operable or inoperable, loaded or unloaded);
Any toy gun which, based on color, design or appearance, would be considered by a reasonable person to be an actual firearm;
Any deadly weapon, defined as any instrument, item, or material readily capable of causing death or serious physical injury;
Any BB gun, pellet gun, air rifle, paint gun, sword (whether decorative or not), or other martial arts weapon;
Any knife (other than an ordinary pocketknife carried in a closed position, with a blade of three inches or less or cutlery of a reasonable size, when used in a kitchen or other food preparation area); or
Any explosive chemical or device including a substance or a combination of substances possessed or prepared for the purpose of producing a visible or audible effect by combustion, explosion, deflagration, or detonation, including fireworks and illegal or potentially dangerous chemicals.
Note: Possession of a license to possess or use any of the above items shall not constitute a defense of any violation of this section.