§ 20. Dedication and maintenance of streets.

Disapproval of a plat by the commission shall be deemed a refusal by the city to accept the offered dedications shown thereon. Approval of a plat shall not be deemed an acceptance of the proposed dedications, and shall not impose any duty upon the city concerning the maintenance of or improvements of any such dedicated parts until the proper authorities of the city have actually appropriated the same by entry, use or improvement. It shall be unlawful for any officer or employee of the city to enter upon or maintain the streets in an urban subdivision; and the city will not accept or maintain said streets unless and until such streets have been surfaced, curbed and guttered, and the required utilities and drainage facilities have been installed, and such improvements have been accepted by the city, with such acceptance evidenced in writing by written certificate of the city engineer.