47 C.F.R. § 1.5002
(b) Indirect equity and voting interests—(1) Equity interests held indirectly in the licensee and/or controlling U.S. parent. Equity interests that are held by an individual or entity indirectly through one or more intervening entities shall be calculated by successive multiplication of the equity percentages for each link in the vertical ownership chain, regardless of whether any particular link in the chain represents a controlling interest in the company positioned in the next lower tier.
(2) Voting interests held indirectly in the licensee and/or controlling U.S. parent. Voting interests that are held by any individual or entity indirectly through one or more intervening entities will be determined depending upon the type of business organization(s) in which the individual or entity holds a voting interest as follows:
(i) Voting interests that are held through one or more intervening corporations shall be calculated by successive multiplication of the voting percentages for each link in the vertical ownership chain, except that wherever the voting interest for any link in the chain is equal to or exceeds 50 percent or represents actual control, it shall be treated as if it were a 100 percent interest.
(ii) Voting interests that are held through one or more intervening partnerships shall be calculated depending upon whether the individual or entity holds a general partnership interest, an uninsulated partnership interest, or an insulated partnership interest as specified in paragraphs (b)(2)(ii)(A) and (B) of this section.
(iii) Voting interests that are held through one or more intervening limited liability companies shall be calculated depending upon whether the individual or entity is a non-member manager, an uninsulated member or an insulated member as specified in paragraphs (b)(2)(iii)(A) and (B) of this section.