Ins. Code, § 6018

No clause shall be inserted nor rider attached affecting the standard form liability of the insurer for loss or damage by fire occasioned either directly or indirectly by earthquake, hurricane, volcanic action or other disturbance of nature, unless such rider or clause is printed in red ink in type larger than pica or in capital letters measuring not less than eight one-hundredths (8/100's) of an inch in height, and unless there is printed at the head of the policy in red ink and in large bold-faced type the words: “This policy contains limitations of liability not permitted in the California standard form.”