The Secretary shall, in accordance with the provisions of this part, and the regulations promulgated by him under this part, make payments of benefits in respect of total disability of any miner due to pneumoconiosis, and in respect of the death of any miner whose death was due to pneumoconiosis or, except with respect to a claim filed under part C of this subchapter on or after the effective date of the Black Lung Benefits Amendments of 1981, who at the time of his death was totally disabled by pneumoconiosis.
The Secretary shall by regulation prescribe standards for determining for purposes of subsection (a) whether a miner is totally disabled due to pneumoconiosis and for determining whether the death of a miner was due to pneumoconiosis. Regulations required by this subsection shall be promulgated and published in the Federal Register at the earliest practicable date after December 30, 1969, and in no event later than the end of the third month following December 1969. Final regulations required for implementation of any amendments to this subchapter shall be promulgated and published in the Federal Register at the earliest practicable date after the date of enactment of such amendments, and in no event later than the end of the fourth month following the month in which such amendments are enacted. Such regulations may be modified or additional regulations promulgated from time to time thereafter.
Nothing in subsection (c) shall be deemed to affect the applicability of subsection (a) in the case of a claim where the presumptions provided for therein are inapplicable.