This source says it may not be the latest version. The local offices should have a copy of the latest version; I would ask for a printout of Chapter 4. Or a printout of changes made to the zoning ordinance in the last five years - or maybe two years, depending on what reaction you get.... some zoning gets lots of changes; some hardly any.
If that is difficult for whatever reason and you want to try to find it online, it is probably faster to look for a history of changes made than to find the latest version.
I am not a lawyer and am not in any other profession having to do with this topic.