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(a) The authority of the Board under this subchapter is exclusive. A rail carrier or corporation participating in or resulting from a transaction approved by or exempted by the Board under this subchapter may carry out the transaction, own and operate property, and exercise control or franchises acquired through the transaction without the approval of a State authority. A rail carrier, corporation, or person participating in that approved or exempted transaction is exempt from the antitrust laws and from all other law, including State and municipal law, as necessary to let that rail carrier, corporation, or person carry out the transaction, hold, maintain, and operate property, and exercise control or franchises acquired through the transaction. However, if a purchase and sale, a lease, or a corporate consolidation or merger is involved in the transaction, the carrier or corporation may carry out the transaction only with the assent of a majority, or the number required under applicable State law, of the votes of the holders of the capital stock of that corporation entitled to vote. The vote must occur at a regular meeting, or special meeting called for that purpose, of those stockholders and the notice of the meeting must indicate its purpose.

(b) A power granted under this subchapter to a carrier or corporation is in addition to and changes its powers under its corporate charter and under State law. Action under this subchapter does not establish or provide for establishing a corporation under the laws of the United States.