http://basketball.realgm.com/nba/draft/future_drafts/detailed Top 12 protected through 2015, unprotected in 16. So basically, if we suck for 3 years in a row, they might get an unprotected lotto pick the 4th year. If we're ever out of the lottery before then, they get the pick.
protected top 12 in 2013-15 http://www.prosportstransactions.com/basketball/DraftTrades/Years/2013.htm