Within five days after the votes shall have been canvassed and the results declared or the result declared by lot as provided for in Section 21-2 above, the Governor shall cause the result of said election to be published, and shall proclaim the persons electors of President and Vice-President so chosen composing the list so elected, by transmitting by mail to the several persons so chosen and composing the list or set elected, electors of President and Vice-President certificates in triplicate, under the Seal of State of their appointment, and shall also transmit under the Seal of State to the Secretary of State of the United States the certificate of the election of said electors as required by the laws of Congress.