Thank you all. I knew it existed in 2013, because i found it in one of my old rule books and it is obviously 5 yds limit now. I have been trying to coach some new officials, who only recall what they had for breakfast this morning.
One thing we miss here is, the “corporate experience” of a long culture of playing and officiating football. If it’s not in games at the moment, they don’t appreciate how rules evolve and where from!
I really appreciate the responses from this site!