Thanks all for your feedback. Decided it's not a fight I'm willing to fight, so we'll just do like the state says. Though I'm sure it will be a point of discussion next year (the "interpretation" was published the last week of the regular season). Though I'll send something to the officials advisory committee.
Though I agree with many, don't understand how "immediately after the half time intermission expires" could result in so many different interpretations!!!
I'm tempted to ask a coach to stay off the field for an hour and see what happens. Heck, it's only a 15-yard penalty.