In practice the group isn't going to object to something obvious like that. But if the rest of the group did object to your call, then yeah, you can't call it unilaterally.
We're arguing in circles now, unless you can actually point out where in the rules it actually defines a violation as anything other than things that cause a stroke penalty. So I'll bow out from further discussion.
I'll bow out, too. The RC stated several years back that they would remove the "definitions" section of the future rulebooks and define each term in its first usage. I'll not do that for you; it's in the book. Ever hear from the RC about this?