In reply to Southern Man:
This is a new idea, brought in following an accident on Illiniza Sur a couple of months ago, so I'm not really sure how it's going to work.
There's only one 6000m peak in Ecuador (Chimborazo), so I imagine the regulations will come in for all of the glaciated peaks, and any mountain with technical problems or scrambling.....i.e pretty much all of the mountains that you'd be interested in.
All of the big mountains, except Antisana, have manned refuges serving the normal routes - so it would presumably be possible to enforce these kind of regulations.
You can bet that the guides would have an eye out for non-guided climbers, too.