Cal. Ins. Code § 12680

If conversion coverage is issued and benefits are also provided to a person under Section 12678, the insurer may limit the conversion benefits provided or available for such person so that such conversion benefits together with benefits provided or available from the sources referred to in Section 12678 shall not exceed 100 percent of the charges for covered benefits. Priority of any coverages involved shall be determined by the effective dates, the earlier one being first.