tive control of a single operator, be able to be developed and operated as a single operation and be contiguous.

(2) After the Secretary has approved the establishment of a logical mining unit, any mining plan approved for that unit must require such diligent development, operation, and production that the reserves of the entire unit will be mined within a period established by the Secretary which shall not be more than forty years. (3) In approving a logical mining unit, the Secretary may provide, among other things, that (i) diligent development, continuous operation, and production on any Federal lease or non-Federal land in the logical mining unit shall be construed as occurring on all Federal leases in that logical mining unit, and (ii) the rentals and royalties for all Federal leases in a logical mining unit may be combined, and advanced royalties paid for any lease within a logical mining unit may be credited against such combined royalties.

(4) The Secretary may amend the provisions of any lease included in a logical mining unit so that mining under that lease will be consistent with the requirements imposed on that logical mining unit.

(5) Leases issued before the date of enactment of this Act may be included with the consent of all lessees in such logical mining unit, and, if so included, shall be subject to the provisions of this section. (6) By regulation the Secretary may require a lessee under this Act to form a logical mining unit, and may provide for determination of participating acreage within a unit.

(7) No logical mining unit shall be approved by the Secretary if the total acreage (both Federal and non-Federal) of the unit would exceed twenty-five thousand acres.

(8) Nothing in this section shall be construed to waive the acreage limitations for coal leases contained in section 27(a) of the Mineral Lands Leasing Act (30 U.S.C. 184(a)).

(30 U.S.C. 202a)

SEC. 3. Any person, association, or corporation holding a lease of coal lands or coal deposits under the provisions of this Act may with the approval of the Secretary of the Interior, upon a finding by him that it would be in the interest of the United States, secure modifications of the original coal lease by including additional coal lands or coal deposits contiguous or cornering to those embraced in such lease, but in no event shall the total area added by such modifications to an existing coal lease exceed one hundred sixty acres, or add acreage larger than that in the original lease. The Secretary shall prescribe terms and conditions which shall be consistent with this Act and applicable to all of the acreage in such modified lease except that nothing in this section shall require the Secretary to apply the production or mining plan requirements of section 2(d)(2) and 7(c) of this Act (30 U.S.C. 201(d)(2) and 207(c)). The minimum royalty provisions of section 7(a) of this Act (30 U.S.C. 207(a)) shall not apply to any lands covered by this modified lease prior to a modification until the term of the original lease or extension thereof which became effective prior to the effective date of this Act has expired.

(30 U.S.C. 203)

[SEC. 4. Repealed]

SEC. 5. That if, in the judgment of the Secretary of the Interior, the public interest will be subserved thereby, lessees holding under lease areas not exceeding the maximum permitted under this Act may consolidate their leases through the surrender of the original leases and the inclusion of such areas in a new lease of not to exceed two thousand five hundred and sixty acres of contiguous lands.

(30 U.S.C. 205)

SEC. 6. That where coal or phosphate lands aggregating two thousand five hundred and sixty acres and subject to lease hereunder do not exist as contiguous areas, the Secretary of the Interior is authorized, if, in his opinion the interests of the public and of the lessee will be thereby subserved, to embrace in a single lease noncontiguous tracts which can be operated as a single mine or unit. (30 U.S.C. 206)

SEC. 7. (a) A coal lease shall be for a term of twenty years and for so long thereafter as coal is produced annually in commercial quantities from that lease. Any lease which is not producing in commercial quantities at the end of ten years shall be terminated. The Secretary shall by regulation prescribe annual rentals on leases. A lease shall require payment of a royalty in such amount as the Secretary shall determine of not less than 122 per centum of the value of coal as defined by regulation, except the Secretary may determine a lesser amount in the case of coal recovered by underground mining operations. The lease shall include such other terms and conditions as the Secretary shall determine. Such rentals and royalties and other terms and conditions of the lease will be subject to readjustment at the end of its primary term of twenty years and at the end of each ten-year period thereafter if the lease is extended.

(b) Each lease shall be subject to the conditions of diligent development and continued operation of the mine or mines, except where operations under the lease are interrupted by strikes, the elements, or casualties not attributable to the lessee. The Secretary of the Interior, upon determining that the public interest will be served thereby, may suspend the condition of continued operation upon the payment of advance royalties. Such advance royalties shall be no less than the production royalty which would otherwise be paid and shall be computed on a fixed reserve to production ratio (determined by the Secretary). The aggregate number of years during the period of any lease for which advance royalties may be accepted in lieu of the condition of continued operation shall not exceed ten. The amount of any production royalty paid for any year shall be reduced (but not below 0) by the amount of any advance royalties paid under such lease to the extent that such advance royalties have not been used to reduce production royalties for a prior year. No advance royalty paid during the initial twentyyear term of a lease shall be used to reduce a production royalty after the twentieth year of a lease. The Secretary may, upon six months' notification to the lessee cease to accept advance royalties in lieu of the requirement of continued operation. Nothing in this

subsection shall be construed to affect the requirement contained in the second sentence of subsection (a) relating to commencement of production at the end of ten years.

(c) Prior to taking any action on a leasehold which might cause a significant disturbance of the environment, and not later than three years after a lease is issued, the lessee shall submit for the Secretary's approval an operation and reclamation plan. The Secretary shall approve or disapprove the plan or require that it be modified. Where the land involved is under the surface jurisdiction of another Federal agency, that other agency must consent to the terms of such approval.

(30 U.S.C. 207)

SEC. 8. That in order to provide for the supply of strictly local domestic needs for fuel, the Secretary of the Interior may, under such rules and regulations as he may prescribe in advance, issue limited licenses or permits to individuals or associations of individuals to prospect for, mine, and take for their use but not for sale, coal from the public lands without payment or royalty for the coal mined or the land occupied, on such conditions not inconsistent with this Act as in his opinion will safeguard the public interests: Provided, That this privilege shall not extend to any corporations: Provided further, That in the case of municipal corporations the Secretary of the Interior may issue such limited license or permit, for not to exceed three hundred and twenty acres for a municipality of less than one hundred thousand population, and not to exceed one thousand two hundred and eighty acres for a municipality of not less than one hundred thousand and not more than one hundred and fifty thousand population; and not to exceed two thousand five hundred and sixty acres for a municipality of one hundred and fifty thousand population or more, the land to be selected within the State wherein the municipal applicant may be located, upon condition that such municipal corporations will mine the coal therein under proper conditions and dispose of the same without profit to residents of such municipality for household use: And provided further, That the acquisition or holding of a lease under the preceding sections of this Act shall be no bar to the holding of such tract or operation of such mine under said limited license.

(30 U.S.C. 208)

SEC. 8A. (a) The Secretary is authorized and directed to conduct a comprehensive exploratory program designed to obtain sufficient data and information to evaluate the extent, location, and potential for developing the known recoverable coal resources within the coal lands subject to this Act. This program shall be designed to obtain the resource information necessary for determining whether commercial quantities of coal are present and the geographical extent of the coal fields and for estimating the amount of such coal which is recoverable by deep mining operations and the amount of such coal which is recoverable by surface mining operations in order to provide a basis for

(1) developing a comprehensive land-use plan pursuant to section 2;

(2) improving the `information regarding the value of public resources and revenues which should be expected from leasing; (3) increasing competition among producers of coal, or products derived from the conversion of coal, by providing data and information to all potential bidders equally and equitably;

(4) providing the public with information on the nature of the coal deposits and the associated stratum and the value of the public resources being offered for sale; and

(5) providing the basis for the assessment of the amount of coal deposits in those lands subject to this Act under subparagraph (B) of section 2(a)(3).

(b) The Secretary, through the United States Geological Survey, is authorized to conduct seismic, geophysical, geochemical, or stratigraphic drilling, or to contract for or purchase the results of such exploratory activities from commercial or other sources which may be needed to implement the provisions of this section.

(c) Nothing in this section shall limit any person from conducting exploratory geophysical surveys including seismic, geophysical, chemical surveys to the extent permitted by section 2(b). The information obtained from the exploratory drilling carried out by a person not under contract with the United States Government for such drilling prior to award of a lease shall be provided the confidentiality pursuant to subsection (d).

(d) The Secretary shall make available to the public by appropriate means all data, information, maps, interpretations, and surveys which are obtained directly by the Department of the Interior or under a service contract pursuant to subsection (b). The Secretary shall maintain a confidentiality of all proprietary data or information purchased from commercial sources while not under contract with the United States Government until after the areas involved have been leased.

(e) All Federal departments or agencies are authorized and directed to provide the Secretary with any information or data that may be deemed necessary to assist the Secretary in implementing the exploratory program pursuant to this section. Proprietary information or data provided to the Secretary under the provisions of this subsection shall remain confidential for such period of time as agreed to by the head of the department or agency from whom the information is requested. In addition, the Secretary is authorized and directed to utilize the existing capabilities and resources of other Federal departments and agencies by appropriate agreement. (f) The Secretary is directed to prepare, publish, and keep current a series of detailed geological, and geophysical maps of, and reports concerning, all coal lands to be offered for leasing under this Act, based on data and information compiled pursuant to this section. Such maps and reports shall be prepared and revised at reasonable intervals beginning eighteen months after the date of enactment of this Act. Such maps and reports shall be made available on a continuing basis to any person on request.

(g) Within six months after the date of enactment of this Act, the Secretary shall develop and transmit to Congress an implementation plan for the coal lands exploration program authorized by this section, including procedures for making the data and information

available to the public pursuant to subsection (d), and maps and reports pursuant to subsection (f). The implementation plan shall include a projected schedule of exploratory activities and identification of the regions and areas which will be explored under the coal lands exploration program during the first five years following the enactment of this section. In addition, the implementation plan shall include estimates of the appropriations and staffing required to implement the coal lands exploration program.

(h) The stratigraphic drilling authorized in subsection (b) shall be carried out in such a manner as to obtain information pertaining to all recoverable reserves. For the purpose of complying with subsection (a), the Secretary shall require all those authorized to conduct stratigraphic drilling pursuant to subsection (b) to supply a statement of the results of test boring of core sampling including logs of the drill holes; the thickness of the coal seams found; an analysis of the chemical properties of such coal; and an analysis of the strata layers lying above all the seams of coal. All drilling activities shall be conducted using the best current technology and practices.

(30 U.S.C. 208-1)

SEC. 8B. Within six months after the end of each fiscal year, the Secretary shall submit to the Congress a report on the leasing and production of coal lands subject to this Act during such fiscal year; a summary of management, supervision, and enforcement activities; and recommendations to the Congress for improvements in management, environmental safeguards, and amount of production in leasing and mining operations on coal lands subject to this Act. Each submission shall also contain a report by the Attorney General of the United States on competition in the coal and energy industries, including an analysis of whether the antitrust provisions of this Act and the antitrust laws are effective in preserving or promoting competition in the coal or energy industry.

(30 U.S.C. 208-2)

PHOSPHATES

SEC. 9. (a) The Secretary of the Interior is authorized to lease to any applicant qualified under this Act, through advertisement, competitive bidding, or such other methods as he may by general regulations adopt, any phosphate deposits of the United States, and lands containing such deposits, including associated and related minerals, when in his judgment the public interest will be best served thereby. The lands shall be leased under such terms and conditions as are herein specified, in units reasonably compact in form of not to exceed two thousand five hundred and sixty acres. (b) Where prospecting or exploratory work is necessary to determine the existence or workability of phosphate deposits in any unclaimed, undeveloped area, the Secretary of the Interior is authorized to issue, to any applicant qualified under this Act, a prospecting permit which shall give the exclusive right to prospect for phosphate deposits, including associated minerals, for a period of two years, for not more than two thousand five hundred and sixty acres; and if prior to the expiration of the permit the permittee