That private enforcing company has zero motivation to make the rule clear and easy to understand. Their letter soliciting license fees or a declaration of not n

That private enforcing company has zero motivation to make the rule clear and easy to understand. Their letter soliciting license fees or a declaration of not needing a license is very obnoxious and threatening. Part of the strategy is that "you won't know whether you need a license, but if we caught you violating this arbitrary opaque rule, you're screwed. So you better pay that money."