Insurance Code (usually included in commercial codals)
(a) To the whole premium if no part of his interest in the thing insured be exposed to any of the perils insured against;
(b) Where the insurance is made for a definite period of time and the insured surrenders his policy, to such portion of the premium as corresponds with the unexpired time, at a pro rata rate, unless a short period rate has been agreed upon and appears on the face of the policy, after deducting from the whole premium any claim for loss or damage under the policy which has previously accrued; Provided, That no holder of a life insurance policy may avail himself of the privileges of this paragraph without sufficient cause as otherwise provided by law.