California Code
CHAPTER 10 - Cancellation or Failure to Renew
Section 667.5.

667.5. Unless a policy specifically provides otherwise, the cancellation of a policy, or any change in the policy, executed by an insurer, at the request of the named insured designated on the declarations page of the policy, shall be binding upon any other insured or named insured.

Notice of cancellation or an endorsement evidencing the named insured’s request shall be mailed or delivered to the address stated in the policy to all individuals or to all entities designated as named insureds on the declarations page of the policy.

(Added by Stats. 1985, Ch. 1266, Sec. 1.)