(1) To apply to register to vote, in addition to any other approved method, a covered voter may use a federal postcard application or the application's electronic equivalent.
(2) A covered voter may use the declaration accompanying a federal write-in absentee ballot to apply to register to vote simultaneously with the submission of the federal write-in absentee ballot.
(3) The secretary of state shall ensure that the electronic transmission system described in 13-21-106 (3) is capable of accepting both a federal postcard application and any other approved electronic registration application sent to the appropriate election official. The voter may use the electronic transmission system when available or any other approved method to register to vote.