Proposition 35 California 2024 Update. The initiative would permanently establish the tax on managed care. The mco tax took effect in 2009 and has been renewed and changed over the years.

 — the saga of how prop 35 came to be on the ballot reveals just how complex the underlying issues are. California voters will decide on november 5th, 2024 whether to pass proposition 35, which would 1) require the state to request federal approval for the managed care.