Changing the Constitution may require Constitutional Delegations of the States.

An amendment may be proposed by a two-thirds vote of both Houses of Congress, or, if two-thirds of the States request one, by a convention called for that purpose. The amendment must then be ratified by three-fourths of the State legislatures, or three-fourths of conventions called in each State for ratification.

https://www.whitehouse.gov/about-the-white-house/our-government/the-constitution/

THEREFORE CBDC may require Constitutional Delegations of the States.