3. Amendment of section 4, Rajasthan Act No. 35 of 1959.-

For the existing section 4 of the principal Act, the following shall be substituted, namely:- "4. Contents of master plan.- The master plan shall define the various zones into which the urban area having the population of more than one lac may be divided for the purposes of its improvement and indicate the manner in which the land in each zone is proposed to be used and shall serve as a basic pattern of framework within which the improvement schemes and the zonal development plans of the various zones may be prepared: Provided that the preparation of zonal development plan shall not be mandatory for urban areas having population of less than one lac.".