The US DOT has published its 2014 Final Rule on the Disadvantaged Business Enterprise Program in the Federal Register. A copy can be downloaded here USDOT DBE Program Final Rule 10-2-14. pdf (20.8 MB). I think of this document as the guidelines the state DOTs including the Iowa DOT use to tailor their own DBE programs.
It does not appear that the Final Rule changes much in the DBE program. This is more of a clarification. A summary of the major changes is linked here 2014 DBE Final Rule Highlights.pdf (86 KB).
Reading the final rule I was reminded how in some states prime contractors are allowed up to five days to provide names, amounts and work types of the DBEs that they are planning on using. In Iowa we have been well served by requiring prime contractors to submit their DBE commitments when they turn in their bids.
I feel obligated to provide this document to Iowa DOT DBE firms although I have always wished that an equal amount of effort, comment, and attention was directed toward developing successful DBE companies by the DOT, prime contractors and DBEs.