In elections, electors shall be permitted to cast write-in votes. The design of the ballot shall permit the superintendents, in counting the write-in votes, to determine readily whether an elector has cast any write-in vote not authorized by law. The Secretary of State, in specifying the form of the ballot, and the State Election Board, in promulgating rules and regulations respecting the conduct of elections, shall
provide for ballot secrecy in connection with write-in votes.