Wherever a plan for major streets and highways has been adopted and filed by the Commission, the Council and Board, upon recommendations of the Commission, are hereby authorized and empowered to establish, regulate, and limit, and to change and amend, building line or setback regulations on such major streets and highways, and to prohibit any new building being located within such building or setback lines within the area. In establishing such building lines, the Council and Board shall take into consideration the present stage of development along such highways, including the type of buildings and nature of their use, as well as their number and location; the present width of such highways; and probable future needs to protect safety and provide adequate transportation along such highways in view of the trend of development of residential, commercial, and industrial areas served by such highways.

Regulations authorized by this section shall not be adopted, changed, or amended by the Council or Board until a public hearing has been held thereon by the Commission.