As a staff attorney (employee), can i deduct any travel expenses (hotel, plane ticket, entrance fee) to attend a CLE (continuing legal education) employer won't pay for?

10 CLEs per year is a requirement to upkeep my law license.  Nothing says I have to attend this out-of-state CLE, but nothing says I can't either.  Vaguely recall a rule saying that if it is necessary for your license and your employer won't pay for it, you can still deduct it.