Code of Federal Regulations Title 20. Employees' Benefits § 20.219.7 How the Board decides what is convincing evidence

(a) The information contained in the evidence was given by a person in a position to know the facts;

(b) There was any reason to give false information when the evidence was created;

(c) The information contained in the evidence was given under oath, or in the presence of witnesses, or with the knowledge that there was a penalty for giving false information;

(d) The evidence was created at the time the event took place or shortly after;

(e) The evidence has been altered or has any erasures on it;  and

(f) The information contained in the evidence agrees with other available evidence, including existing Board records.