The volume quantity for the purpose of reports filed under parts 17 and 18 of this chapter is trading volume of 50 or more contracts, during a single trading day, on a single reporting market that is a board of trade designated as a contract market under section 5 of the Act or a swap execution facility registered under section 5h of the Act, in all instruments that such reporting market designates with the same product identifier (including purchases and sales, and inclusive of all expiration months).