All incorporated cities in the state of Washington are hereby authorized and empowered to regulate and prescribe the manner and form of making any future survey or plat of lands within their respective limits and enforce such regulations by a fine of not exceeding one hundred dollars, to be recovered by and in the name of such city, or imprisonment not exceeding twenty days for each violation of any ordinance regulating such survey and platting: PROVIDED, That nothing in this chapter shall be construed so as to apply to additions to towns in which no lots have been sold.