Example. In 1958, taxpayer A acquired two separate operating mineral interests designated No. 1 and No. 2. Each is an interest in a single mineral deposit in a single tract of land. In the same year, taxpayer A made his first development expenditure with respect to a mine on operating mineral interest No. 1 and a mine on operating mineral interest No. 2. Operating mineral interests Nos. 1 and 2 are operated as a unit. Taxpayer A did not elect to aggregate operating mineral interests Nos. 1 and 2 under section 614(c)(1) within the time prescribed for making such an election. In 1960 taxpayer A made his first development expenditure with respect to a second mine on operating mineral interest No. 2. Taxpayer A elected under section 614(c)(2) to treat operating mineral interest No. 2 as two separate operating mineral interests, designated as Nos. 2(a) and 2(b), for the taxable year 1960 and all subsequent taxable years. No. 2(a) contained the mine for which the first development expenditure was made in 1958, and No. 2(b) contained the mine for which the first development expenditure was made in 1960. If taxpayer A wishes to do so, he may elect to aggregate mineral interests Nos. 1 and 2(b) under section 614(c)(1) for the taxable year 1960 and all subsequent taxable years since the first development expenditure with respect to the mine on operating mineral interest No. 2(b) was made during the taxable year 1960. Taxpayer A may not elect to aggregate mineral interests Nos. 1 and 2(a) under such section since the time for making such an election has expired.
Except as provided in subparagraphs (2) and (3) of this paragraph, the election under section 614(c)(2) and paragraph (b) of this section to treat a single operating mineral interest as more than one operating mineral interest shall be made under section 614(c)(3)(A) not later than the time prescribed by law for filing the taxpayer's income tax return (including extensions thereof) for whichever of the following taxable years is the later:
However, if the latest time at which an election may be made under this subparagraph falls on or before May 1, 1961, such election may be made or modified at any time on or before May 1, 1961. See paragraph (c) of § 1.614-6 as to the binding effect of an election where the basis of a separate operating mineral interest in the hands of the taxpayer is determined by reference to the basis in the hands of a transferor.
In accordance with section 614(c) (3)(B), the election under section 614(c)(2) and paragraph (b) of this section to treat an operating mineral interest as more than one operating mineral interest may, at the election of the taxpayer, be made not later than the time prescribed by law for filing the taxpayer's income tax return (including extensions thereof) for whichever of the following taxable years is the later:
However, if the latest time at which an election may be made under this subparagraph falls on or before May 1, 1961, such election may be made or modified at any time on or before May 1, 1961. See paragraph (c) of § 1.614-6 as to the binding effect of an election where the basis of a separate operating mineral interest in the hands of the taxpayer is determined by reference to the basis in the hands of a transferor.
Example: In 1953, taxpayer A owned six separate operating mineral interests, designated No. 1 through No. 6, which he operated as a unit. Operating mineral interests Nos. 1 through 5 comprise a mine, and operating mineral interest No. 6 represents one mineral deposit in a single tract of land which is being extracted by means of two mines. In accordance with section 614(c)(3)(B) and subparagraph (2) of this paragraph, taxpayer A elects under section 614(c)(2) to treat operating mineral interest No. 6 as two separate operating mineral interests for the taxable year 1954 and all subsequent taxable years. Unless taxpayer A also makes an election under section 614(c)(1) to aggregate operating mineral interests Nos. 1 through 5 for the taxable year 1954 and all subsequent taxable years in accordance with section 614(c)(3)(B) and subparagraph (2) of this paragraph, he shall be deemed to have made an election to treat each of such interests as a separate property. Taxpayer A may not elect, under section 614(c) (1) and (3)(A), to aggregate operating mineral interests Nos. 1 through 5 for the taxable year 1958 or any subsequent taxable year.
For the purpose of applying subdivisions (e) and (g) of this subdivision, if the first expenditure for development or operation with respect to a separate operating mineral interest or a mine was made prior to the first taxable year for which the election with respect to such interest or mine is applicable, the taxpayer may state that such is the case in lieu of identifying the exact taxable year in which such first expenditure was made. In any case where part of the information required under this subdivision can be adequately supplied by means of appropriately marked maps, the statement may be accompanied by such maps and may omit the required descriptive material to the extent replaced by the maps. The taxpayer shall maintain adequate records and maps in support of the above information. In the event that the first expenditure for development or operation with respect to a separate operating mineral interest is made by the taxpayer in a taxable year subsequent to the taxable year for which an election under this section has been made with respect to the operating unit of which such interest is a part, the taxpayer shall furnish information describing such interest in sufficient detail to identify it as a part of such operating unit, to show whether it is a part of a mine with respect to which the interests have previously been aggregated or have previously been treated as separate properties, and to indicate whether it is to be included within an aggregation.
If a recomputation of tax is required to be made for any taxable year in the case of the aggregation of an additional interest to an existing aggregation under section 614(c)(1), such recomputation shall be made as if:
For purposes of this paragraph, any aggregation which is treated as having been formed under subdivisions (a) and (b) or under subdivisions (c) and (d) shall be referred to as the constructed aggregated property.
Example. Assume that taxpayer A elects under section 614(c)(1) to form an aggregation for 1960 and all subsequent taxable years. Assume further that taxpayer A is required to recompute his tax for four prior taxable years under subparagraphs (1) and (2) of this paragraph and that the recomputation for each of such taxable years results in a reduction of taxpayer A's depletion allowance. Under subdivision (i) of this subparagraph, the total increase in tax resulting from the recomputation is to be taken into account in equal installments in 1960, 1961, 1962, and 1963. However, if the total increase in tax is not determinable until 1961 because the recomputation for the prior taxable years results in the reduction of a net operating loss carryover to 1961, then the total increase shall be taken into account in equal installments in 1961, 1962, and 1963. In like manner, if the total increase in tax is not determinable until 1962, it shall be taken into account in equal installments in 1962 and 1963.
However, the adjusted basis of an aggregated property formed under section 614(c)(1) may be increased only to the extent such excess would have resulted in an increase in such adjusted basis if taken into account under paragraph (a) of § 1.614-6 . Thus, if depletion previously allowed with respect to the separate operating mineral interests included in the aggregation formed under section 614(c)(1) exceeds the total of the unadjusted bases of such interests by $5,000, and if the recomputation of tax required to be made under this paragraph results in a depletion allowance which is $7,000 less than the depletion actually deducted with respect to such interests, then the adjusted basis of such aggregation may be increased by only $2,000. If, with respect to the same aggregated property formed under section 614(c)(1), adjustments to adjusted basis are required under this subparagraph as a result of recomputation of tax for two or more taxable years, the total or net amount of such adjustments shall be taken into account. Any adjustment to the adjusted basis of an aggregation required by this subparagraph shall be taken into account as of the effective date of the election to form such aggregation under section 614(c)(1) and shall be effective for all purposes of subtitle A of the Code. For other rules relating to the determination of the adjusted basis of an aggregated property, see paragraph (a) of § 1.614-6 .
26 C.F.R. §1.614-3