The evidence strongly supports the truthfulness of the statement. The primary sources, which are official publications from the U.S. Commodity Futures Trading Commission (CFTC) itself, directly confirm the claim. An official CFTC press release explicitly states that an updated staff letter 'expands the list of eligible margin collateral to include payment stablecoins issued by entities such as national trust banks.' Another primary source from the CFTC website corroborates this, mentioning the reissuance of a letter to 'specify that a national trust bank can be a permitted issuer of a payment stablecoin.' These high-authority, high-relevance sources provide direct and unambiguous evidence. A secondary source also reports on this development, further corroborating the official announcements. There is no conflicting evidence among the provided sources. The statement is a factual summary of the policy update announced by the CFTC staff.