; and (B) the exemption will not have a material adverse effect on the ability of the Commission or the digital commodity exchange to discharge regulatory or self-regulatory duties under this Act. (2) The Commission may exempt, conditionally or unconditionally, a digital commodity exchange from registration under this section if the Commission finds that the digital commodity exchange is subject to comparable, comprehensive supervision and regulation on a consolidated basis by the appropriate governmental authorities in the home country of the facility. (j) Customer defined In this section, the term customer means any person that maintains an account for the trading of digital commodities directly with a digital commodity exchange (other than a person that is owned or controlled, directly or indirectly, by the digital commodity exchange) for its own behalf or on behalf of any other person. (k) Federal preemption Notwithstanding any other provision of law, the Commission shall have exclusive jurisdiction over any digital commodity exchange registered under this section. (l) Withdrawal of certification of a blockchain system (1) In general (A) Determination by a digital commodity exchange With respect to a certification of a blockchain system that becomes effective pursuant to section 44(f) of the Securities Exchange Act of 1934, if a digital commodity exchange determines that the blockchain system may not be a decentralized system, the digital commodity exchange shall notify the Commission of such determination. (B) Withdrawal process With respect to each notification received under subparagraph (A), the Commission shall initiate a withdrawal process under which the Commission shall— (i) publish a notice announcing the proposed withdrawal; (ii) provide a 30 day comment period with respect to the proposed withdrawal; and (iii) after the end of the 30-day comment required under clause (ii), publish either— (I) a notification of withdrawal of the applicable certification