The home rule charter adopted by any city may be amended or repealed by proposals submitted to and ratified by the qualified electors of the city in the same general manner provided in sections 40-05.1-02 and 40-05.1-04 for the adoption of the charter. Amendments may be proposed by the governing body of the city or by petition of the number of electors provided in section 40-05.1-02 and submitted to the voters at the same election. The voters may at their option accept or reject any or all of the amendments by a majority vote of qualified electors voting on the question at the election. A proposal to repeal a home rule charter that has been adopted must likewise be submitted to the electors of the city as set forth in this section. One copy of a ratified amendment or a repeal of a home rule charter must be filed with the secretary of state and one with the city auditor. Upon proper filing of the amendment or repeal, the courts shall take judicial notice of the amendment or repeal.