to the waiving of any restrictions under this paragraph that are reasonably necessary to protect customers, including eligible contract participants, non-eligible contract participants, or any other class of customers. (ii) Customer choice A digital commodity broker or digital commodity dealer may not require a waiver from a customer described in subparagraph (A) as a condition of doing business with the broker or dealer. (D) 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. (l) Federal preemption Notwithstanding any other provision of law, the Commission shall have exclusive jurisdiction over any digital commodity broker or digital commodity dealer registered under this section. (m) Exemptions In order to promote responsible economic or financial innovation and fair competition, or protect customers, the Commission may (on its own initiative or on application of the registered digital commodity broker or registered digital commodity dealer) exempt, unconditionally or on stated terms or conditions, or for stated periods, and retroactively or prospectively, or both, a registered digital commodity broker or registered digital commodity dealer from the requirements of this section, if the Commission determines that— (1) (A) the exemption would be consistent with the public interest and the purposes of this Act