I'm not going to post my jurisdiction,
but I've read the regulations and know for a fact that grey water disposal anywhere other than a sewer or septic system is forbidden. As far as enforcement, it will only become an issue when the house is eventually sold, which, God willing, won't be until my wife and I are six feet under in our very own "zone of disposal."

Even if we did find ourselves having to sell the house for some reason it would be easily put back to the way it was with a few fittings and some lengths of PVC. The County Health Department would be responsible for any type of enforcement, and the only way they find out about this type of stuff is when they are doing inspections for new installs or repairs, (not happening anytime even remotely soon) or when investigating complaints-Its not as if I'm looking to dump it onto my neighbor's lawn. I'm a 1/4 mile off of the road in the woods, so there is no one to see anything or to complain.
Interestingly, I just went back through my files and found the septic plan with our closing documents. In it, the engineer that designed the system specifically stated "Garbage disposals and water softening equipment shall NOT be discharged to this system." In doing a bit of research I found that I can buy a lint filter for the washing machine, which is my biggest worry (the system should be adequately sized to handle the water), but it sounds like I really need to get the water softener discharge out of there ASAP.