Hi CW - Unfortunately, I do not know the legalities of the situation.
And also, unfortunately, I only infrequently travel through that section of highway, in being an "eastsider." Hopefully, happya$$ can be of better assistance, in verifying the more recent happenings in that area.
As of one year ago, to-date, my last trip through that section of highway while en-route to the airport from my home, I can definitely say that yes, Lindale Township was still running their usual trap(s) in that location.
Trapster reports date to as late as December of this past year.
My understanding was that the law passed in the late '90s was revoked later - but I have no current idea as to the letter of the law, there.