From and after March 31, 1970, any plat for a new addition, or subdivision to the city subject to the provisions of this Chapter, and any authority granted hereunder, shall not be approved by the Planning Commission unless such plat shall provide that all new utility facilities shall, to the extent practicable and feasible, be placed underground, it being specifically provided that this Chapter shall not apply to utility facilities aboveground existing within any addition or subdivision heretofore platted or on which a preliminary plat has heretofore been approved by the Planning Commission, or which existed prior to March 31, 1970, nor shall it apply to the maintenance, repair, or replacement of such existing utility facilities aboveground. (Ord. A-844 §3, 1970).