1. Treatment of natural mineral waters and spring waters with ozone-enriched air shall only be carried out if–
(a)it is for the purpose of separating compounds of iron, manganese, sulphur and arsenic from water in which they occur naturally at source;
(b)prior to treatment the requirements of paragraphs 3, 4 and 5 of Schedule 4 are satisfied; and
(c)the treatment does not have a disinfectant action.