passive activity
(A)The term “passive activity” shall not include any working interest in any oil or gas property which the taxpayer holds directly or through an entity which does not limit the liability of the taxpayer with respect to such interest. (B)If any taxpayer has any loss for any taxable year from a working interest in any oil or gas property which is treated as a loss which is not from a passive activity, then any net income from such property (or any property the basis of which is determined in whole or in part by reference to the basis of such property) for any succeeding taxable year shall be treated as income of the taxpayer which is not from a passive activity. If the preceding sentence applies to the net income from any property for any taxable year, any credits allowable under subpart B (other than section 27) or D of part IV of subchapter A for such taxable year which are attributable to such property shall be treated as credits not from a passive activity to the extent the amount of such credits does not exceed the regular tax liability of the taxpayer for the taxable year which is allocable to such net income.