related foreign person
(3) Special rule for original issue discount on obligation held by related foreign person (A) In general If any debt instrument having original issue discount is held by a related foreign person, any portion of such original issue discount shall not be allowable as a deduction to the issuer until paid. The preceding sentence shall not apply to the extent that the original issue discount is effectively connected with the conduct by such foreign related person of a trade or business within the United States unless such original issue discount is exempt from taxation (or is subject to a reduced rate of tax) pursuant to a treaty obligation of the United States. (B) Special rule for certain foreign entities (i) In general In the case of any debt instrument having original issue discount which is held by a related foreign person which is a controlled foreign corporation (as defined in section 957 ) or a passive foreign investment company (as defined in section 1297), a deduction shall be allowable to the issuer with respect to such original issue discount for any taxable year before the taxable year in which paid only to the extent such original issue discount is includible (determined without regard to properly allocable deductions and qualified deficits under section 952(c)(1)(B)) during such prior taxable year in the gross income of a United States person who owns (within the meaning of section 958(a)) stock in such corporation. (ii) Secretarial authority The Secretary may by regulation exempt transactions from the application of clause (i), including any transaction which is entered into by a payor in the ordinary course of a trade or business in which the payor is predominantly engaged. (C) Related foreign person For purposes of subparagraph (A), the term “related foreign person” means any person— (i) who is not a United States person, and (ii) who is related (within the meaning of section 267(b) ) to the issuer.
26 USC § 163(e)(3)
None identified, default scope is assumed to be the parent (part VI) of this section.