Other rules
The Secretary shall, applying the principles of this section, prescribe rules for the application of this paragraph, including rules for the determination of—
(i)#
the entities (if any) which are to be to be treated under subparagraph (B)(iii)(II) as having a common parent which is a foreign corporation,
(ii)#
the entities to be included in a foreign-parented multinational group, and
(iii)#
the common parent of a foreign-parented multinational group.