A health insurance policy shall contain a provision as follows: "ENTIRE CONTRACT; CHANGES: This policy, including the indorsements and the attached papers, if any, constitutes the entire contract of insurance. No change in this policy shall be valid until approved by an executive officer of the insurer and unless such approval be indorsed hereon or attached hereto. No insurance producer has authority to change this policy or to waive any of its provisions."
ORS 743.411