There was a clarification done more recently that helps explain. The Wikipedia page explains it.
Basically: just casually swearing? No. Cursing out a person in their face, causing severe anguish and/or a public disturbance? To the point where it might be described by bystanders as verbal assault? Yeah, that’s illegal.
Wait, does (a) mean they can simply arrest you for swearing!? Who decides if what you did was ‘disorderly’? This sounds dangerously vague
There was a clarification done more recently that helps explain. The Wikipedia page explains it.
Basically: just casually swearing? No. Cursing out a person in their face, causing severe anguish and/or a public disturbance? To the point where it might be described by bystanders as verbal assault? Yeah, that’s illegal.