The small subset of codes in my area that I personally looked at were significantly out of date and it was unlikely that they would be updated anytime soon. There are state codes which were out of date for a long time but they just recently updated. However there are also local codes which are not up to date. When they're not in direct conflict you need to follow both, if they are then technically the state should take precedence, but if you look into it then you'll find that the locality doesn't care and will fine you and it's up to you to defend it which will be expensive and you could still lose. The codes are only as good as the people maintaining them and it seems that the maintenance is not a priority. This was not for electrical - perhaps that one is given more attention.