How to find what code is in my area for insulation in an unfinished basement?
All areas that are above ground should have insulation.  R-20 would be about the minimum - what you should ever do.  You can ask your local inspector and they will possibly differ and want more or less.  I myself do about R-30ish for basements and live close to you.  

I just did my own basement 4 years ago and used Roxul at about R-30 depth and only did the portion about one foot below grade (my basement only shows 1 foot) and my basement is an oven now in the winter, even when we close vents.  

In our region the biggest concern isn't the insulation on the outer wall concrete, it is making sure the joist area is packed and no air gaps.  Just doing that will be 80-90% of the conservation of energy.  The walls, while doing them is fine, remember that for all of the warming effects in the winter, you will lose cooling effects during the other seasons.  You have way more basement above grade than I do so what you have seems OK, but I would check the joist area.