I would immediately stop any hint of the LVN's initiating any care plans, pronto. The LVN's can contribute to the care plan. This is a number one priority.
Any admission/initial assessments need to be countersigned by the RN. "I agree with/concur with /have reviewed the LVN's assessment." - or similar wording. An additional note can be added if the RN feels additional information is needed.
Telephone triage can be tweaked where telephone messages are collected, and then "triaged" to the RN for further review until such a time when a decision tree can be decided upon and implemented. NO advice is to be given in the meantime, even if it is for something as simple sounding as a hang-nail. (Kaiser hospital uses some non-nurses for incoming calls....but they are extremely, very, highly scripted - and RN's "audit" the telephone calls intermittently.) Any deviation from the script and the call is kicked over to an RN.
These are the things that I have learned after many years of being an LVN in California and having to report to an RN, as well as many subsequent years of being an RN in California and in turn, delegating to LVN's.
Hope this helps. It may not be a pleasant experience for all involved, but ignorance of the law will not protect you, nor those who will be affected when the other shoe drops.