That last part in Section 3 is vague but I think the offense in question is the offense of doing what they’re telling you you now cannot do (when minors are present, etc). It is then retroactive on your original offense which is unconstitutional.

Judge James Beaty of the Middle District struck the law as unconstitutional in April, 2016. The NC Legislature re-wrote the law to comport with Judge Beaty’s ruling. The new law (which includes the same 300 foot buffer) goes into effect September 1. NCRSOL believes the new language is far more restricting than the original statute’s language and everyone is poised to draw guns (figuratively speaking).

http://www.ncleg.net/Sessions/2015/Bills/House/PDF/H1021v8.pdf (actual revisions)

Interesting that they give libraries as an example, especially as I was once told that public libraries are an acceptable place. And “only when minors are present?” How am I to know when minors are going to be present?

Interesting that the State Fair prohibition is now in black and white, as I’ve been told every year that I’m not permitted to go in the first place.

More interestingly, at the very end of that PDF, it reads, “this act becomes effective September 1, 2016, and applies to offenses committed on or after that date”. That sounds very much like it is not retroactive and therefore wouldn’t apply to the person mentioned in this post.