DUI…AGAIN!

David Cassidy has just been charged with one count of driving under the influence of alcohol  …

 Cassidy was arrested in L.A. Jan. 10th after cops say he made an illegal right turn. We’re told he had alcohol on his breath … and failed a field sobriety test.

Law enforcement sources tell us he blew a .19 in the field — more than twice the legal limit —  and refused to submit to more testing back at the police station.

Cassidy has two prior convictions for DUI — in NY and FL — and according to the city attorney that means he’ll serve a mandatory 96 hours in jail if convicted this time … and could face up to a year behind bars.

Someone is headed to Rehab…..