When the count of ballots is completed, and in no event later than the day after the election, the election board shall make a certificate in duplicate of the results. The certificate includes the number of votes cast for each candidate, for and against each proposition, yes or no on each question, and any additional information prescribed by the director. The election board shall, immediately upon completion of the certificate or as soon thereafter as the local mail service permits, send in one sealed package to the director one copy of the certificate and the register. In addition, all ballots properly cast shall be mailed to the director in a separate, sealed package. Both packages, in addition to an address on the outside, shall clearly indicate the precinct from which they come. Each board shall, immediately upon completion of the certification and as soon thereafter as the local mail service permits, send the duplicate certificate to the respective election supervisor. The director may authorize election boards in precincts in those areas of the state where distance and weather make mail communication unreliable to forward their election results by telephone or radio. The director may authorize the unofficial totaling of votes on a regional basis by election supervisors, tallying the votes as indicated on duplicate certificates. To ensure adequate protection, the director shall prescribe the manner in which the ballots, registers, and all other election records and materials are thereafter preserved, transferred, and destroyed.