The amount of reduction to be applied under subsection (a) (not in excess of the portion referred to in subsection (a)), and the particular properties the bases of which are to be reduced, shall be determined under regulations prescribed by the Secretary.
For purposes of this section, the term “depreciable property” means any property of a character subject to the allowance for depreciation, but only if a basis reduction under subsection (a) will reduce the amount of depreciation or amortization which otherwise would be allowable for the period immediately following such reduction.
For purposes of this section, any interest of a partner in a partnership shall be treated as depreciable property to the extent of such partner’s proportionate interest in the depreciable property held by such partnership. The preceding sentence shall apply only if there is a corresponding reduction in the partnership’s basis in depreciable property with respect to such partner.
At the election of the taxpayer, for purposes of this section, the term “depreciable property” includes any real property which is described in section 1221(a)(1).
An election under clause (i) shall be made on the taxpayer’s return for the taxable year in which the discharge occurs or at such other time as may be permitted in regulations prescribed by the Secretary. Such an election, once made, may be revoked only with the consent of the Secretary.
For purposes of this paragraph, the term “qualified property” has the meaning given to such term by section 108(g)(3)(C).
In the case of an amount excluded from gross income under section 108(a)(1)(A), no reduction in basis shall be made under this section in the basis of property which the debtor treats as exempt property under section 522 of title 11 of the United States Code.
For purposes of this title, a reduction in basis under this section shall not be treated as a disposition.