The States having plenary power over the appointment of electors may make provision by law for the contingency of an elector dying between the date of his appointment and the time for the casting of his vote, or by sickness or accident being prevented from voting. By an act passed March 1, 1792, Congress provided that the States should appoint the electors each four years within thirty days of the first Wednesday in December. The date for the meeting and voting of the electors was fixed, and the mode of transmitting the result to Washington. Section 5 then declared: "That Congress shall be in session on the second Wednesday in February, 1793, and on the second Wednesday in February succeeding every meeting of the electors, and the said certificates, or so many of them as shall have been received, shall then be opened, the votes counted and the persons who shall fill the offices of President and Vice-President ascertained and declared, agreeably to the Constitution."