Definition

A real and significant—not speculative or trivial—risk of initiating nonconsensual physical force to another person or their property.

Local community determines the threshold

What exactly constitutes a substantial risk is a subjective grey-area, and must be decided by the local community.

Examples

• Impairment from drugs or alcohol.
• Storing dangerous materials in a populated area.
• Someone in possession of a firearm that is either a violent felon, mentally incompetent, or technically incompetent. Weapons with more significant harm to greater numbers of people at further distances also require more stringent rules that need to be determined.