Pub. L. 91-173, tit. IV, pt. C, sec. 423

Sec. 423. (a) During any period in which a State workmen’s compensation law is not included on the list published by the Secretary under section 421(b) each operator of an underground coal mine in such State shall secure the payment of benefits for which he is liable under section 422 by (1) qualifying as of self-insurer in accordance with regulations prescribed by the Secretary, or (2) insuring and keeping insured the payment of such benefits with any stock company or mutual company or association, or with any other person or fund, including any State fund, while such company, association, person or fund is authorized under the laws of any State to insure workmen’s compensation. (b) In order to meet the requirements of clause (2) of subsection (a) of this section, every policy or contract of insurance must contain— (1) a provision to pay benefits required under section 422, notwithstanding the provisions of the State workmen’s compensation law which may provide for lesser payments; (2) a provision that insolvency or bankruptcy of the operator or discharge therein (or both) shall not relieve the carrier from liability for such payments; and (3) such other provisions as the Secretary, by regulation, may require. (c) No policy or contract of insurance issued by a carrier to comply with the requirements of clause (2) of subsection (a) of this subsection shall be canceled prior to the date specified in such policy or contract for its expiration until at least thirty days have elapsed after 83 Stat. 798notice of cancellation has been sent by registered or certified mail to the Secretary and to the operator at his last known place of business.