29 Intangible drilling costs. For tax years beginning on or after January 1, 1986, but

before January 1, 1987, intangible drilling and development costs which pertain to any well for the production of oil, gas, or geothermal energy, and which are incurred after the commencement of the installation of the production casing for the well, are not allowed as an expense in the tax year when the costs were paid or incurred and must be added to net income. Instead of expensing the intangible drilling and development costs which are incurred after the commencement of the installation of the production casing for a well, the expenses must be amortized over a 26-month period, beginning in the month in which the costs are paid or incurred if the costs were incurred for a well which is located in the United States, the District of Columbia, and those continental shelf areas which are adjacent to United States territorial waters and over which the United States has exclusive rights with respect to the exploration and exploitation of natural resources as provided in Section 638 of the Internal Revenue Code. In the case of intangible drilling and development costs which are incurred for oil or gas wells outside the United States, those costs must be recovered over a ten-year straight-line amortization period beginning in the year the costs are paid or incurred. However, in lieu of amortization of the costs, the taxpayer may elect to add these costs to the basis of the property for cost depletion purposes. Revenue[701] Ch 302, p.30 IAC 2/5/25 For tax years beginning on or after January 1, 1987, the intangible drilling costs, which are an addition to income subject to amortization, are the intangible drilling costs described in Section 57(a)(2) of the Internal Revenue Code. These intangible drilling costs are an item of tax preference for federal minimum tax purposes for tax years beginning after December 31, 1986. This rule is intended to implement Iowa Code section 422.7. [Editorial change: IAC Supplement 11/2/22]