When RN's Lose the Power to Delegate Duties

Our facility did some restructuring pending a move to another location. Previously we had a nursing supervisor who oversaw the duties of the Medication/Behavioral Technicians and UAP's. Being unable to juggle a family, full time employment and school, she chose to give up her position and move to part-time. The lead supervisor who is a licensed addiction counselor created two head-technician positions while remaining in charge overall. Medical personnel are no longer in the chain of command, so have two questions. First of all, do I, as an RN-BSN still have the authority to delegate duties to the BT’s and UAP’s? Secondly, am I still responsible for medical errors they commit? Can I lose my license in the event of a catastrophic error that they commit? Any advice you can give would be appreciated.