Bush has essentially admitted that he used cocaine in his Clintonesque, carefully worded partial denials. He won't deny using cocaine or marijuana, though under persistent questioning he said that he hadn't used cocaine in the last 7 years. Most newspapers report that he denies using cocaine since 1974, but that's not exactly true.
That is the most favorable interpretation of what Bush said, but since Bush and his campaign have already made Clintonesque denials on other issues, we need to look at his words carefully.
What Bush actually said was ""I could have passed the FBI background check on the standards applied on the most stringent conditions when my dad was president of the United States - a 15-year period," Mr. Bush said. This is ambiguous because background forms ask slightly different questions, depending on the position. Drug questions can go back one year, seven years or 10 years. Bush Jr. didn't have any formal position in his father's administration, so which one applies is unclear. And 15-years is not one of the choices.
Since Bush Sr.'s presidency began in January 1989, reporters assumed that Jr. was denying drug use for 15 years before that, to 1974. But that is not at all clear. His only direct statement was for seven years before today. He could easily have been denying drug use only for 15 years before today, based on 7 or 10 years dating back from the END of his dad's term. 10 years before 1993, the end of Bush Sr.'s term, is pretty close to 15 years before today.
The Clinton administration actually has a stricter standard than Bush did -- the FBI now asks about any drug use after age 18. But Governor Bush has refused to say whether he would pass that standard, even though that is what he will be asked if he wins. Bush also has refused to answer whether he could have passed the FBI test when his father was vice president, during the 8 years from 1981-1989.
As for the arrest and diversion charge, Governor Bush admits working at the center in 1972. When asked for comment, Bush's campaign spokesman reportedly said "Oh shit... no comment."
http://www.realchange.org/bushjr.htm#partied