If you do not have a "certified copy" (the one with the State Seal on it, not the hospital issued birth certificate) get ready to jump through some hoops - especially if you were adopted!
I relocated back to Utah last year, and went down to get a Utah driver's license. I was told that a federal law took effect in 2009, and that I had to have a certified copy of my birth certificate in order to get a driver's license now.
Well, here's where things become even more complicated, because I was born in NJ, and adopted by my maternal grandparents in NY when I was 5 years old. Not only do I need the certified birth certificate to get my driver's license, but I need a certified copy of the Final Order of Adoption from NY State to prove the name change. What does NY want from me to get the Adoption Order? A certified copy of my birth certificate from NJ! I'm jumping through more hoops than a circus dog, in order to prove - after 67 years on Earth, 53 years of paying income tax, and 20+ years in the US military - that I am indeed a bona fide American citizen. BUT... in order to get the Adoption Certificate I have to have "certified copies" of my grandparents (the adopters) Death Certificates, to which I never had access. Tracking those down will probably take a month or so, dealing with the bureaucracies of Pinellas County. Florida and some other county in NY, who will also probably want copies of whatever!
To make matter even worse, in my case all of these things must be taken care of through the US Postal Service. That means delays of at least one week in each direction if everything goes smoothly... which it never does! I figure, with any luck, I should have my Utah driver's license sometime in 2012. My retired Air Force ID means nothing in this process, much like my Top Secret clearance status while I was on active duty, or the fact that the FBI approved me to buy several firearms just last year.
This is not just a Utah law! Proof of citizenship is now required by Federal law prior to issuing a driver's license, so, my advice to you is this: if you are a native-born American, and you don't have a certified copy of your birth certificate, complete with the state seal, and your current driver's license was issued prior to 2009, get a certified copy of whatever you need before you find yourself in the same bureaucratic quagmire that I'm in! Especially if you were adopted!!
Luckily, my Oregon driver's license doesn't expire until 2015. With any luck this should be resolved by then. Does this keep illegal aliens from driving? NO! - they'll drive without a license, which is a minor offense compared to violating our border. Or, they'll have somebody illegally create the required documents to obtain a license. If Obama can do it, why can't they?