After the adoption of said master comprehensive plan and of any zoning regulations promulgated by said Commission, no improvement of any nature shall be commenced within said District, nor shall the use of any land be changed therein, without a permit issued by the Director of said Commission.
Added by Laws 1953, p. 406, § 10, emerg. eff. June 8, 1953. Amended by Laws 1970, c. 327, § 7, emerg. eff. April 28, 1970.