Only one household pet which does not exceed 20 pounds in weight will be allowed for each Unit only so long as it does not become a nuisance to other Owners. If any pet creates noise, is allowed to be outdoors except on a leash, or in any way creates a disturbance or unpleasantness, the Board will be forced to rule that the pet must be removed. No pet shall be tied to or leashed anywhere on Oak Knoll property, nor shall any pet be allowed to relieve itself on any Oak Knoll property. Each owner shall hold the Board harmless against loss or liability for any actions of his pet within Oak Knoll Condominium.