(1) The resolution or petition to adopt the form of government provided in this chapter shall further define the structure of the form by including one (1) selection from the choices specified for the offices listed in sections 31-5404 through 31-5409, Idaho Code.
(2)  If the resolution or petition provides for the election of any new officers, such officers shall be elected at the general election following the adoption of the optional form of county government provided for in this chapter.