The rule has been around for a long time. I remember discussing it with Dr. Naismith. He put it in as a 5
minute rule because too many teams were taking 7, 8 or even 10 minutes between passes.
Here's one of the first teams to play under that rule. MTD Sr. and I worked some of their games and that rule made a big difference. Teams were now scoring more than 3 points a game!