qualifying employer security
(5) The term “qualifying employer security” means an employer security which is— (A) stock, (B) a marketable obligation (as defined in subsection (e)), or (C) an interest in a publicly traded partnership (as defined in section 7704(b) of title 26 ), but only if such partnership is an existing partnership as defined in section 10211(c)(2)(A) of the Revenue Act of 1987 ( Public Law 100–203 ). After December 17, 1987 , in the case of a plan other than an eligible individual account plan, an employer security described in subparagraph (A) or (C) shall be considered a qualifying employer security only if such employer security satisfies the requirements of subsection (f)(1).