California Code, Insurance Code - INS § 6019

(a) Covering property and risks not otherwise covered; provided that clauses covering loss or damage caused by nuclear reaction, nuclear radiation or radioactive contamination, all whether directly or indirectly resulting from an insured peril under the standard policy issued pursuant to Section 6010 may be insured under said policy only by a written endorsement providing such insurance, with such endorsement affixed to said standard policy.

(b) Assuming greater liability than is otherwise imposed on the insurer.

(c) Granting the insured permits and privileges not otherwise provided.

(d) Waivers of any of the matters voiding the policy or suspending the insurance.

(e) Waivers of any of the requirements imposed on the insured after loss.