The United States Office of the Comptroller of the Currency (OCC) issued Interpretive Letter 1184 clarifying that national banks and federal savings associations may provide certain crypto-asset custody and execution-related services as permissible banking activities. The letter confirms that banks may buy and sell assets held in custody at a customer’s direction and may outsource bank-permissible crypto-asset activities, including custody and execution services, to third parties, subject to appropriate third-party risk management practices. Crypto-asset custody activities, including when conducted through a sub-custodian, must be performed in a safe and sound manner and in compliance with applicable law; the OCC noted related authority addressed in Interpretive Letters 1170 and 1183.