Closely guarded clarification

[BillyMac]

I've been researching this since a coach asked me about it in a scrimmage a few weeks ago. After going through the NFHS Rule Book, and Case Book, I'm 95% sure that the five second count continues even as the dribbler and the defender are separted by a screener, as long as they stay within six feet of each other. I say 95% sure because I can't find anything that says otherwise in a NFHS publication.

That said, the 5% uncertainty in my mind comes from only a single source, not a NFHS source, but an IAABO source:

2005 IAABO Refresher Exam - Question 22: A-1 is holding the ball in the front court and is closely guarded by B-1. As the official count is at two, A-2 takes and holds a position between A-1 and B-1. Official discontinues the 5 second closely guarded violating count. Is the official correct. Answer Yes, Citations 4-10, 4-23-1.

Even though I'm not an NCAA official, I do know with 100% certainty, that the count is stopped in NCAA:

NCAA 4-13-4: "When a player is positioned between the player in control of the ball and his or her opponent, who is within 6 feet (men) or 3 feet (women), a closely guarded situation does not exist.

For high school games governed by NFHS rules, I can't explain the Refresher Exam answer. My local board interpreter insists that there is not a mistake in the anser key, so it appears that for those of us who are members of IAABO, we stop the count, based solely on one test question on one Refresher Exam.

Help! Please help! I'm so confused!