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 condition of doing business with the digital asset broker or digital asset dealer. (iv) Blockchain service defined In this subparagraph, the term blockchain service means any activity relating to validating transactions on a blockchain system, providing security for a blockchain system, or other similar activity required for the ongoing operation of a blockchain system. (5) Further Limitations No person shall treat or deal with a restricted digital asset held on behalf of any customer pursuant to paragraph (4) by utilizing any unit of such restricted digital asset to participate in a blockchain service (as defined in paragraph (5)(B)(iv)) or a decentralized governance system associated with the restricted digital asset or the blockchain system to which the restricted digital asset relates in any manner other than that which is expressly directed by the customer from which such unit of a restricted digital asset was received. (g) Capital requirements (1) In general Each registered digital asset broker and registered digital asset dealer shall meet such minimum capital requirements as the Commission may prescribe to ensure that the digital asset broker or digital asset dealer is able to— (A) conduct an orderly wind-down of the activities of the digital asset broker or digital asset dealer