(a)

General rule

For the purpose of computing the depletion allowance in the case of mines, wells, and other natural deposits, the term "property" means each separate interest owned by the taxpayer in each mineral deposit in each separate tract or parcel of land.

(b)

Special rules as to operating mineral interests in oil and gas wells or geothermal deposits

In the case of oil and gas wells or geothermal deposits -

(1)

In general

Except as otherwise provided in this subsection -

(A)

all of the taxpayer's operating mineral interests in a separate tract or parcel of land shall be combined and treated as one property, and

(B)

the taxpayer may not combine an operating mineral interest in one tract or parcel of land with an operating mineral interest in another tract or parcel of land.

(2)

Election to treat operating mineral interests as separate properties

If the taxpayer has more than one operating mineral interest in a single tract or parcel of land, he may elect to treat one or more of such operating mineral interests as separate properties. The taxpayer may not have more than one combination of operating mineral interests in a single tract or parcel of land. If the taxpayer makes the election provided in this paragraph with respect to any interest in a tract or parcel of land, each operating mineral interest which is discovered or acquired by the taxpayer in such tract or parcel of land after the taxable year for which the election is made shall be treated -

(A)

if there is no combination of interests in such tract or parcel, as a separate property unless the taxpayer elects to combine it with another interest, or

(B)

if there is a combination of interests in such tract or parcel, as part of such combination unless the taxpayer elects to treat it as a separate property.

(3)

Certain unitization or pooling arrangements

(A)

In general

Under regulations prescribed by the Secretary, if one or more of the taxpayer's operating mineral interests participate, under a voluntary or compulsory unitization or pooling agreement, in a single cooperative or unit plan of operation, then for the period of such participation -

(i)

they shall be treated for all purposes of this subtitle as one property, and

(ii)

the application of paragraphs (1), (2), and (4) in respect of such interests shall be suspended.

(B)

Limitation

Subparagraph (A) shall apply to a voluntary agreement only if all the operating mineral interests covered by such agreement -

(i)

are in the same deposit, or are in 2 or more deposits the joint development or production of which is logical from the standpoint of geology, convenience, economy, or conservation, and

(ii)

are in tracts or parcels of land which are contiguous or in close proximity.

(C)

Special rule in the case of arrangements entered into a taxable years beginning before January 1, 1964

If -

(i)

two or more of the taxpayer's operating mineral interests participate under a voluntary or compulsory unitization or pooling agreement entered into in any taxable year beginning before January 1, 1964, in a single cooperative or unit plan of operation,

(ii)

the taxpayer, for the last taxable year beginning before January 1, 1964, treated such interests as two or more separate properties, and

(iii)

it is determined that such treatment was proper under the law applicable to such taxable year,

such taxpayer may continue to treat such interests in a consistent manner for the period of such participation.

(4)

Manner, time, and scope of election

(A)

Manner and time

Any election provided in paragraph (2) shall be made for each operating mineral interest, in the manner prescribed by the Secretary by regulations, not later than the time prescribed by law for filing the return (including extensions thereof) for whichever of the following taxable years is the later: The first taxable year beginning after December 31, 1963, or the first taxable year in which any expenditure for development or operation in respect of such operating mineral interest is made by the taxpayer after the acquisition of such interest.

(B)

Scope

Any election under paragraph (2) shall be for all purposes of this subtitle and shall be binding on the taxpayer for all subsequent taxable years.

(5)

Treatment of certain properties

If, on the day preceding the first day of the first taxable year beginning after December 31, 1963, the taxpayer has any operating mineral interests which he treats under subsection (d) of this section (as in effect before the amendments made by the Revenue Act of 1964), such treatment shall be continued and shall be deemed to have been adopted pursuant to paragraphs (1) and (2) of this subsection (as amended by such Act).

(c)

Special rules as to operating mineral interests in mines

(1)

Election to aggregate separate interests

Except in the case of oil and gas wells and geothermal deposits, if a taxpayer owns two or more separate operating mineral interests which constitute part or all of an operating unit, he may elect (for all purposes of this subtitle) -

(A)

to form an aggregation of, and to treat as one property, all such interests owned by him which comprise any one mine or any two or more mines; and

(B)

to treat as a separate property each such interest which is not included within an aggregation referred to in subparagraph (A).

For purposes of this paragraph, separate operating mineral interests which constitute part or all of an operating unit may be aggregated whether or not they are included in a single tract or parcel of land and whether or not they are included in contiguous tracts or parcels. For purposes of this paragraph, a taxpayer may elect to form more than one aggregation of operating mineral interests within any one operating unit; but no aggregation may include any operating mineral interest which is a part of a mine without including all of the operating mineral interests which are a part of such mine in the first taxable year for which the election to aggregate is effective, and any operating mineral interest which thereafter becomes a part of such mine shall be included in such aggregation.

(2)

Election to treat a single interest as more than one property

Except in the case of oil and gas wells and geothermal deposits, if a single tract or parcel of land contains a mineral deposit which is being extracted, or will be extracted by means of two or more mines for which expenditures for development or operation have been made by the taxpayer, then the taxpayer may elect to allocate to such mines, under regulations prescribed by the Secretary, all of the tract or parcel of land and of the mineral deposit contained therein, and to treat as a separate property that portion of the tract or parcel of land and of the mineral deposit so allocated to each mine. A separate property formed pursuant to an election under this paragraph shall be treated as a separate property for all purposes of this subtitle (including this paragraph). A separate property so formed may, under regulations prescribed by the Secretary, be included as a part of an aggregation in accordance with paragraphs (1) and (3). The election provided by this paragraph may not be made with respect to any property which is a part of an aggregation formed by the taxpayer under paragraph (1) except with the consent of the Secretary.

(3)

Manner and scope of election

The elections provided by paragraphs (1) and (2) shall be made, in accordance with regulations prescribed by the Secretary, not later than the time prescribed for filing the return (including extensions thereof) for the first taxable year -

(A)

in which, in the case of an election under paragraph (1), any expenditure for development or operation in respect of the separate operating mineral interest is made by the taxpayer after the acquisition of such interest, or

(B)

in which, in the case of an election under paragraph (2), expenditures for development or operation of more than one mine in respect of a property are made by the taxpayer after the acquisition of the property.

An election made under paragraph (1) or (2) for a taxable year shall be binding upon the taxpayer for such year and all subsequent taxable years, except that the Secretary may consent to a different treatment of any interest with respect to which an election has been made.

(d)

Operating mineral interests defined

For purposes of this section, the term "operating mineral interest" includes only an interest in respect of which the costs of production of the mineral are required to be taken into account by the taxpayer for purposes of computing the taxable income limitation provided for in section 613, or would be so required if the mine, well, or other natural deposit were in the production stage.

(e)

Special rule as to nonoperating mineral interests

(1)

Aggregation of separate interests

If a taxpayer owns two or more separate nonoperating mineral interests in a single tract or parcel of land or in two or more adjacent tracts or parcels of land, the Secretary shall, on showing by the taxpayer that a principal purpose is not the avoidance of tax, permit the taxpayer to treat (for all purposes of this subtitle) all such mineral interests in each separate kind of mineral deposit as one property. If such permission is granted for any taxable year, the taxpayer shall treat such interests as one property for all subsequent taxable years unless the Secretary consents to a different treatment.

(2)

Nonoperating mineral interests defined

For purposes of this subsection, the term "nonoperating mineral interests" includes only interests which are not operating mineral interests.