HHS has posted the MLR interim regulation at – http://www.hhs.gov/news/press/2010pres/11/20101122a.html. The model regulation primarily followed the NAIC recommendations with a few exceptions.
The NAIC has drafted a model act to exchanges, which can be found by clicking here
A new Kaiser Family Foundation study examines the existing laws and regulations in all 50 states that currently govern the review process for health insurance rates.