to be maintained in a structurally safe condition. (C) A restriction that requires any deteriorated or structurally unsafe component of an amateur station antenna to be repaired, replaced, or removed. (D) A restriction that requires an amateur station antenna to be removed if the property on which the antenna is located ceases to be subject to the control of an amateur operator. (E) A restriction that requires an amateur station antenna ground-mounted electrical enclosure, ground-mounted control enclosure, or guy wire anchor to be visually screened if such enclosure or anchor— (i) is visible from the street faced by the dwelling