(4) as in the normal course of business shall be necessary to transfer, adjust, or settle a restricted digital asset transaction pursuant to a customer’s instruction (standing or otherwise) may be withdrawn and applied to such purposes, including the withdrawal and payment of commissions, brokerage, interest, taxes, storage, and other charges lawfully accruing in connection with a restricted digital asset transaction. (iii) Commission action In accordance with such terms and conditions as the Commission may prescribe by rule, regulation, or order, any money, assets, or property of a customer of a digital asset broker or digital asset dealer described in paragraph (4) may be commingled and deposited as provided in this section with any other money, assets, or property received by the digital asset broker or digital asset dealer and required by the Commission to be separately accounted for and treated and dealt with as belonging to the customer of the digital asset broker or digital asset dealer. (B) Participation in blockchain services (i) In general A customer shall have the right to waive the restrictions in paragraph (4) for any unit of a digital asset to be used under clause (ii), by affirmatively electing, in writing to the digital asset broker or digital asset dealer, to waive the restrictions. (ii) Use of funds Customer digital assets removed from segregation under clause (i) may be pooled and used by the digital asset broker or digital asset dealer or its designee to provide a blockchain service for a blockchain system to which the unit of the digital asset removed from segregation under clause (i) relates. (iii) Limitations (I) In general The Commission may, by rule, establish notice and disclosure requirements, and any other limitations and rules related to the waiving of any restrictions under this subparagraph that are reasonably necessary to protect customers. (II) Customer choice A digital asset broker or digital asset dealer may not require a waiver from a customer described in clause (i) as a