UST ETFs that fall within the scope of the regulatory framework set forth in SEC Rule 6c-11 may qualify as eligible IM collateral as defined in the CFTC Margin Rule, provided the funds meet the criteria listed in Commission Regulation 23.156(a)(1)(ix). CSEs may collect or post UST ETFs that qualify as IM under Commission Regulation 23.156(a)(1)(ix) as VM for uncleared swap transactions with financial end users consistent with Commission Regulation 23.156(b)(1)(ii).