The following regulations shall apply to residential fences:
   (a)   Residential fencing is not to be topped with sharp points such as may readily result in bodily injury.
   (b)   Retaining walls that measure more than three feet above the lowest grade level they are proposed to serve shall be protected by a fence not less than four feet high, except that such fence need not be more than three feet high when the retaining wall extends beyond the building line.
   (c)   The height of fences shall be measured from a point not to exceed six inches above the finished grade line or natural contour of the ground. Fences shall follow the contour of the ground as far as is practical.
   (d)   Where solid fences are erected and where a water drainage situation may occur, such problem shall be disposed of by placing adequate outlets at the bottom of the fence to eliminate possible accumulation of stagnant water or other undesirable conditions.
   (e)   Fences may be solid or open and may be constructed of masonry, metal, wood, a natural plant species or any other substantial material securely fastened to the ground, in conformity with accepted engineering practices.
   (f)   Fences shall comply with all other applicable provisions of the Zoning Code and the Building and Housing Code.