In connection with the listing of the Board of Trade of the City of Chicago, Inc.’s (“CBOT” or “Exchange”) 30-Year Uniform Mortgage-Backed Securities (UMBS) To-Be-Announced (TBA) Futures – 7.0% Coupon Contract (the “Contract”) on trade date Monday, May 19, 2025 (see SER-9537R dated April 28, 2025), please note below and in Appendix B of CBOT Submission No. 25-127 the corresponding position limit (Rule 559), aggregation allocations (Rule 559.D.), accountability levels, and reportable level (Rule 561) for the new contract. For the full text of this notice, please see link attached below.