Any master plan prepared and adopted by the planning and zoning commission shall be submitted to the city council, who shall adopt, revise, amend or rescind such plan by ordinance duly adopted. The city council may only revise, amend or rescind such plan by a two-thirds (2/3) vote of all members of the council. (Ord. 406, 5-18-1966; amd. Ord. 944, 2-20-1997)