17 CFR 155.1: Definitions.

For purposes of this part, the term affiliated person of a futures commission merchant or of an introducing broker means any general partner, officer, director, owner of more than ten percent of the equity interest, associated person or employee of the futures commission merchant or of the introducing broker, and any relative or spouse of any of the foregoing persons, or any relative of such spouse, who shares the same home as any of the foregoing persons.