General Motors now has a similar program.
Before ANY diesel repairs are made, the TECH II must be hooked up and data pulled out of a certain module address and sent to "the big house" to be analyzed before any warranty repairs are authorized. I think my GM buddy said it pays something like .2 or something, and he said it takes about 40 minutes to get what you need, and then another hour and a half to get approval.
From what I understand, most techs are able to see where the modified data is, as their TSB shows you what the stock programming looks like, and what the modified programming looks like. I can't locate the TSB offhand, but I will get it and paste it here. I am not 100% certain either, if this is just with trucks that currently have the programming installed, or trucks that HAVE been flashed, or whatever.