No tax or assessment of any kind shall be levied by any political subdivision whose enabling legislation does not provide for an elected governing authority. This section does not prohibit the levying or collection of a tax or special assessment by an initial appointed governing authority where the appointed governing authority will be replaced by an elected one within six years of the date the appointed authority takes office. The provisions of this section shall not be effective until July 1, 1976. (As added November 5, 1974.)