What is a futures contract "round-turn"?

The term "round-turn" as used in NFA Bylaw 1301(b) is intended to include all transactions where an actual futures position is closed out or offset. This would include futures positions closed out by delivery, cash settlement, through an exchange for physicals, and as a result of the transfer to the carrying FCM from another FCM of offsetting futures contracts.

(Note: Although the NFA assessment fee for futures is calculated on a round-turn basis, NFA Bylaws leave Member FCMs free to invoice and accrue the fee at any point in a round-turn or to split the fee among transactions which make up a round-turn.)