According to the PTCB, if you have a "drug related" Misdemeanor or Felony that is within 5 years, that would instantly dis-qualify you. However, if it is over five years ago, the Board will look at it on a case by case basis and determine how the court/judge handled it, what have you done since, etc.
In the case of a 30 Year old DUI (if it was only Alcohol you were under the influence of) you will need to disclose it to them and the board will more than likely push it through. If you have other offenses or mis-demeanors / felonies then they may not.
2) State Board of Pharmacy
Each state BOP runs a little different, You will want to call yours and ask them the parameters for this. I called mine here in Oregon and they said almost exactly what the PTCB said. How long ago and whether it was drug related makes a difference. Alcohol is not an RX and you can buy it just about everywhere. Because of that, it's not "Drug related", However, when it's determined by a medical professional as an addiction that can change it's classification. If your DUI included a blood test and you were on controlled substances, then obviously that's a bit different.
If anyone knows more about this , please add a comment using the link below.
Does a DUI conviction disqualify me from getting certified ?