14 CFR §198.1

1. (a)The President of the United States has determined that the continuation of that aircraft operation is necessary to carry out the foreign policy of the United States;
2. (b)The aircraft operation is—
   1. (1)In foreign air commerce or between two or more places all of which are outside the United States if insurance with premium is sought; or
   2. (2)In domestic or foreign air commerce, or between two or more places all of which are outside the United States if insurance without premium is sought; and
3. (c)The Administrator finds that commercial insurance against loss or damage arising out of any risk from the aircraft operation cannot be obtained on reasonable terms from an insurance carrier.