§ 410.456. Determining origin of pneumoconiosis, including statutory presumption—survivor's claim.

(a) If a miner was employed for 10 years or more in the Nation's coal mines, and suffered from pneumoconiosis, it will be presumed, in the absence of persuasive evidence to the contrary, that the pneumoconiosis arose out of such employment.

(b) In any other case, the claimant must submit the evidence necessary to establish that the pneumoconiosis from which the deceased miner suffered, arose out of employment in the Nation's coal mines. (See § 410.110 (h), (i), (j), (k), (l), and (m).)