The powers of Council shall be legislative only, and it shall perform no administrative duties and shall not appoint or confirm any officer or employee except those of its own body, except when otherwise provided by law. After authority to make contracts has been given and the necessary appropriation made, Council shall take no further action thereon. Such contracts shall be entered into and conducted to performance by the board or officers having charge of the matters to which they relate.
Council shall not authorize the making of any contract which is not to go into full operation during the term for which the members of such Council with the longest term are elected.