Well i might have made things sound a bit to simple, there will be a cost to state, local, or federal government in the efforts to enforce these codes. Seems the problem is the resources aren't in place at the moment to ensure these codes are being properly implemented. So coin would have to be spent to hire and train more inspectors and im sure cerftification seminars would need to be developed for properly interpeting and implementing energy codes will need to be given to practicing contractors and new contractor liscenesing tests for those entering the industry. But hey thats the price for continuing to do business in a certification/licscence type industry..Its not really a big deal truthfully, it happens all the time already with re-certification liscened contractors need to get on different yearly type schedules. So necessarliy free but the energy and $$ that could be saved to both the owners of these structures and state and local governments on energy bills would probably far outway the cost then again thats just speculations but im sure someones doing studies on it.