The written agreement between a crypto asset custodian and the holders of these assets must...

Crypto asset custodians are subject to detailed controls designed to safeguard client assets and prevent operational errors or unauthorised transactions. The CISI UAE Financial Rules and Regulations expressly requires a custodian to adopt procedures that identify and prevent the execution of multiple instructions in respect of the same transaction approved by a client . The custodian must enter into a signed written agreement with every holder whose crypto assets it safeguards, with that agreement specifying the custodian's relevant duties and obligations. Other safeguards include segregating client assets from the custodian's property, keeping accurate ownership records, controlling cryptographic keys, maintaining transaction logs and ensuring that no single individual can completely authorise actions over client crypto assets. The rules do not prohibit employees from having any access to cryptographic keys; rather, they prevent unilateral complete control by one person. Nor is this provision designed to bar non-qualified investors from ownership. The particular procedure identified in the question is prevention of duplicate execution instructions for the same transaction. Consequently, option B is correct.

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