The claimant shall furnish proof to the satisfaction of the appropriate TTB officer regarding the following:

1. (a) That the tax on the liquors, or the tax and duty if imported, was fully paid; or the tax, if not paid, was fully determined.
2. (b) That the liquors were lost, made unmarketable, or condemned by a duly authorized official, by reason of damage sustained as a result of a disaster or other cause of loss specified in this subpart.
3. (c) The type and date of occurrence of the disaster or other specified cause of loss, and the location of the liquors at the time.
4. (d) That the claimant was not indemnified by a valid claim of insurance or otherwise for the tax, or tax and duty, on the liquors covered by the claim.
5. (e) That the claimant is entitled to payment under this subpart.