NFHS Closely Guarded Rule History

[Remington]

Hi All ~ During a HS game last night my partner called a closely guarded violation. A1 dribbling and guarded by B1, then a switch and guarded by B2 and stayed w/in 6 feet. Easy call. The coach argued that a switch required a new count (coach officiates NCAA-M rule set) and after the game asked about it and apologized for not knowing the rule.

My question is, has the count always continued under NFHS if any opponent remained w/in 6 feet or was that rule changed a few years back? The oldest book I have was 2004 and it was the rule then. Just wondering if anyone knows the history. I tried doing a search but couldn't find anything.

Thanks in advance for any insight you may have.