The person having the greatest Number of votes for President, shall be the President, *****if such number be a majority of the whole number of Electors appointed;***** and if no person have such majority, then from the persons having the highest numbers not exceeding three on the list of those voted for as President, the House of Representatives shall choose immediately, by ballot, the President. But in choosing the President, the votes shall be taken by states, the representation from each state having one vote; a quorum for this purpose shall consist of a member or members from two-thirds of the states, and a majority of all the states shall be necessary to a choice. – U.S. Constitution, Amendment XII
Can’t be appointed until the vote is certified - otherwise Clinton’s appointed electors would count, too!