It's also Unconstitutional.
Article I, Section 9:
No Tax or Duty shall be laid on Articles exported from any State.
Article I, Section 10:
No State shall, without the Consent of the Congress, lay any Imposts or Duties on Imports or Exports, except what may be absolutely necessary for executing it's inspection Laws: and the net Produce of all Duties and Imposts, laid by any State on Imports or Exports, shall be for the Use of the Treasury of the United States; and all such Laws shall be subject to the Revision and Controul of the Congress.
“No State shall, without the Consent of the Congress”
How long will that take?