17 CFR 38.254: Ability to obtain information.

(a) The designated contract market must have rules that require traders in its contracts to keep records of their trading, including records of their activity in the underlying commodity and related derivatives markets, and make such records available, upon request, to the designated contract market.

(b) A designated contract market with participants trading through intermediaries must either use a comprehensive large-trader reporting system (LTRS) or be able to demonstrate that it can obtain position data from other sources in order to conduct an effective surveillance program.