In all subdivisions, the subdivider shall construct sidewalks on both sides of all streets which are contained entirely within the boundary of the subdivision. Where the boundary of a subdivision is an existing street or a proposed street, sidewalks shall then be installed on the nearest adjacent side or sides. All sidewalks shall be installed and constructed in accordance with the applicable uniform standards. In subdivisions containing blocks of over 800 feet in length and where pedestrian ways or easements are provided, sidewalks shall be installed within such ways or easements. Sidewalks shall be provided on all street improvement projects which are initiated by the Council or contracted for by any Federal, State or public body. (Code 1981 § 41-125. Code 1995 § 134-173.)