For the purpose of promoting the health, safety and general welfare of municipalities and governmental subdivisions in the state; for the purpose of conserving the value of buildings and encouraging the most appropriate use of land; for the purpose of providing for the public health, comfort and general welfare in living and working conditions; for the purpose of facilitating highway development and transportation and for the purpose of regulating and restricting unsightly and detrimental developments tending to depreciate the value of property and obstruct progressive improvements in such municipalities and governmental subdivisions, the legislative body of any town, city or borough, in addition to powers conferred by the statutes or special acts upon such towns, cities or boroughs or the respective officials thereof, may enact ordinances creating restricted districts within which any motor vehicle recycler’s yard or motor vehicle recycler’s business shall not be permitted to be established; provided, in any town, city or borough having a zoning commission or town or city planning commission or board, such zoning commission, planning commission or board shall have the authority to create such restricted districts by the adoption of appropriate rules, orders or regulations, and provided any ordinances, bylaws or regulations adopted prior to October 1, 1957, under the provisions of section 4654 of the general statutes, revision of 1949, otherwise valid except that they were not adopted pursuant to the procedure provided in this section, shall remain valid until altered or repealed under the provisions of this section.