Shade trees shall be planted along any street and along any residential district boundary where required. Shade trees shall have a minimum caliper of two (2) inches as measured five (5) feet above the ground and be of a species approved by the approving authority. Trees shall be planted between thirty (30) and forty (40) feet apart, in a distance from the curbline, as approved by the approving authority. Trees shall be balled and burlapped, certified nursery grown, free from insects and disease and true to species and variety. Stripping trees or filling around trees shall not be permitted unless it can be shown that construction requirements necessitate removal of trees, in which case those lots shall be replanted with trees to re-establish the tone of the area and to conform with adjacent lots. Dead or dying trees shall be replaced by the subdivider during the next recommended planting season. There shall be a minimum of one (1) shade tree per lot in the front yard.