you misread. this is the important part.
you just highlighted the definition part clarifying what the words in the regulations below mean. Essentially you can use mace in DEFENSE...but if you use mace to assault someone in a bar fight while they're helpless, or mace someone and then rob them...it gives the prosecutor something else to charge them with. "dangerous weapons" above the snippet you posted is the title of the section, it doesn't mean the words below are considered defined as "dangerous weapons".
Thank you for the clarification. My error.