The Secretary may enter into agreements with operators of coal mines who may be liable for the payment of benefits under section 932 of this title, under which the Black Lung Compensation Insurance Fund established under subsection (a) (hereinafter in this section referred to as the “insurance fund”) shall assume all or part of the liability of such operator in return for the payment of premiums to the insurance fund, and on such terms and conditions as will fully protect the financial solvency of the insurance fund. During any period in which such agreement is in effect the operator shall be deemed in compliance with the requirements of section 933 of this title with respect to the risks covered by such agreement.

The Secretary may also enter into reinsurance agreements with one or more insurers or pools of insurers under which, in return for the payment of premiums to the insurance fund, and on such terms and conditions as will fully protect the financial solvency of the insurance fund, the insurance fund shall provide reinsurance coverage for benefits required to be paid under section 932 of this title.

the types, classes, and locations of operators or facilities which shall be eligible for such insurance or reinsurance;

the classification, limitation, and rejection of any operator or facility which may be advisable;

appropriate premiums for different classifications of operators or facilities;

appropriate loss deductibles;

experience rating; and

any other terms and conditions relating to insurance or reinsurance coverage or exclusion which may be appropriate to carry out the purposes of this section.

On the basis of estimates made by the Secretary in formulating a premium schedule under subsection (e), and such other information as may be available, the Secretary shall from time to time prescribe by regulation the chargeable premium rates for types and classes of insurers, operators of coal mines, and facilities for which insurance or reinsurance coverage shall be available under this section and the terms and conditions under which, and the area within which, such insurance or reinsurance shall be available and such rates shall apply.

Such premium rates shall be (A) based on a consideration of the risks involved, taking into account differences, if any, in risks based on location, type of operations, facilities, type of coal, experience, and any other matter which may be considered under accepted actuarial principles; and (B) adequate, on the basis of accepted actuarial principles, to provide reserves for anticipated losses.

All premiums received by the Secretary shall be paid into the insurance fund.

If, after all outstanding current obligations of the insurance fund have been liquidated and any outstanding amounts which may have been advanced to the insurance fund from appropriations authorized under subsection (i) have been credited to the appropriation from which advanced, the Secretary determines that the moneys of the insurance fund are in excess of current needs, he or she may request the investment of such amounts as he or she deems advisable by the Secretary of the Treasury in public debt securities with maturities suitable for the needs of the insurance fund and bearing interest at prevailing market rates.