The selected text below about fencing rules is taken (in excerpts) from the Architectural Guidelines.  These are used to review any modifications that are made.  Please review/be informed about these and the rest of the guidelines before making any changes.  

Broken, rotted or damaged fence pickets must be replaced with new pickets substantially identical in material and style to the existing pickets. Wooden fence and gate material must be kept in its natural state and may not be stained or painted

All new or replacement wooden fences and gates shall be approximately 6 feet, 6-inches (6-6") in height. The 6-foot portion will be comprised of a standard 6-inch (6") wide, "dog-eared" wooden cedar picket of a nominal 6-foot (6') height. The 6-inch (6") height will be a horizontal treated rot board at the base. The treated rot board shall be a nominal 6-inch (6") width, except that up to twelve-inch (12") rot boards may, with ARC approval, be used in certain instances (such as a rot board that tapers from 6" to 12" in order to maintain a level fence line). No other base materials shall be allowed (e.g, treated or untreated pine pickets or untreated rot boards).  

No paint or stain finish is permitted on wooden fences. Only an approved clear (without color or tint) preservative sealer or other approved clear finish is permitted to be applied to the wood pickets or any other portion of a wooden fence. 

Any gate and/or fence that does not comply with these ARC Guidelines and is being replaced, whether or not the current fence was approved by the ARC, must be brought into compliance with these ARC Guidelines at the time of replacement.