"For additional information see the Instructions for Form 4720.taxmap/pubs/p557-041.htm#en_us_publink1000200441Supporting organization transactions occurring after July 25, 2006.(p58)For any supporting organization, defined in section 509(a)(3), an excess benefit transaction includes grants, loans, compensation, or other similar payment provided by the supporting organization to a: Substantial cont" . . . . .