If any variance, change from one nonconforming use to another nonconforming use, continuation of a nonconforming use or special exception granted by the Board under the provisions of this article is granted subject to conditions precedent, the conditions precedent must be carried out in full in accordance with the terms hereof, and must thereafter be kept and maintained for as long as the variance, change from one nonconforming use to another nonconforming use, continuation of a nonconforming use or special exception is in effect. In the event that any such condition precedent is not kept or maintained, is allowed to lapse, or fall into disrepair, the variance, change from one nonconforming use to another nonconforming use, continuation of a nonconforming use or special exception granted by the Board under the provisions of this article shall become null and void, and thereafter the property shall revert to its former zoning status. Thereafter, the said variance, change from one nonconforming use to another nonconforming use, continuation of a nonconforming use or special exception shall not be reinstated, nor the use thereunder resumed, unless a new special exception is granted by the Board under the provisions of this article.