No building intended for commercial use shall be erected, operated or permitted to remain on any of lots unless off-street parking facilities for customers' cars are provided to the minimum extent of _________[e.g., twice] the square foot area of the building floor space, such parking to be designated for convenient customer access and paved with concrete or other durable, permanent paving construction. Plans and specifications for any buildings and parking areas must receive the written approval of the neighborhood committee in accordance with the provisions herein.