(2) Holdings attributable to active management For purposes of paragraph (1)(B), the following shall be treated as an interest which is not held by a limited partner or a limited entrepreneur: (A) in the case of any individual who has actively participated (for a period of not less than 5 years) in the management of any trade or business of farming, any interest in a partnership or other enterprise which is attributable to such active participation, (B) in the case of any individual whose principal residence is on a farm, any partnership or other enterprise engaged in the trade or business of farming such farm, (C) in the case of any individual who is actively participating in the management of any trade or business of farming or who is an individual who is described in subparagraph (A) or (B), any participation in the further processing of livestock which was raised in such trade or business (or in the trade or business referred to in subparagraph (A) or (B)), (D) in the case of an individual whose principal business activity involves active participation in the management of a trade or business of farming, any interest in any other trade or business of farming, and, (E) any interest held by a member of the family (or a spouse of any such member) of a grandparent of an individual described in subparagraph (A), (B), (C), or (D) if the interest in the partnership or the enterprise is attributable to the active participation of the individual described in subparagraph (A), (B), (C), or (D). For purposes of subparagraph (A), where one farm is substituted for or added to another farm, both farms shall be treated as one farm. For purposes of subparagraph (E), the term “family” has the meaning given to such term by section 267(c)(4).
26 USC § 461(k)(2)
None identified, default scope is assumed to be the parent (subpart C) of this section.