25.4—What type of evidence is required to establish a claim under this part?

Claims of employees of the United States who are neither citizens nor residents of the United States, any territory or Canada, if otherwise compensable, shall be approved only upon evidence of the following nature without regard to the date of injury or death for which claim is made:
(a) Appropriate certification by the Federal employing establishment; or
(b) An armed service's casualty or medical record; or
(c) Verification of the employment and casualty by military personnel; or
(d) Recommendation of an armed service's “Claim Service” based on investigations conducted by it.