The planting, growing, propagating, cultivating or selling of plants, roots, or cuttings of cultivated black currants (Ribes nigrum), other than those cultivars that are immune or resistant to white pine blister rust disease or currant rust (Cronartium ribicola) as described in section 192.2 of this Part, is prohibited, except in designated fruiting currant districts as defined in section 192.3 of this Part.