contractual right
(c) As used in this section, the term “contractual right” includes a right set forth in a rule or bylaw of a derivatives clearing organization (as defined in the Commodity Exchange Act), a multilateral clearing organization (as defined in the Federal Deposit Insurance Corporation Improvement Act of 1991), a national securities exchange, a national securities association, a securities clearing agency, a contract market designated under the Commodity Exchange Act, a derivatives transaction execution facility registered under the Commodity Exchange Act, or a board of trade (as defined in the Commodity Exchange Act) or in a resolution of the governing board thereof, and a right, whether or not evidenced in writing, arising under common law, under law merchant, or by reason of normal business practice.