The proposed charter shall be submitted by the charter commission to the board of county commissioners and the board of county commissioners shall submit the proposed charter to the electors of the county at the general election next following submission of the final report in which all qualified electors of the county are eligible to vote. In submitting such proposed charter to the board of county commissioners, the charter commission may submit alternative sections or articles to the board of county commissioners. Any alternative sections or articles shall be submitted by the board of county commissioners for approval or rejection by the electors. Any section or article of a proposed charter which affects the size or structure of the board of county commissioners may be submitted at the same election at which the proposed charter is submitted but shall be submitted as a separate question on the ballot. An affirmative vote of a majority of the qualified electors voting on the question shall be required for the adoption of such charter.