The Regulations, inter alia: (a) prescribe a definition of and conditions for use of authorised ozone-enriched air oxidation technique (reg. 3 and the Schedule); (b) allow, for the first time, treatment of natural mineral waters with an authorised ozone-enriched air oxidation technique (reg. 4); (c) set maximum limits for certain naturally-occurring substances in natural mineral water and standards for methods used to detect these substances (reg. 5 and the Schedule); (d) prohibit the treatment of natural mineral water with unauthorised ozone-enriched air oxidation techniques (reg. 6); (f) provide for an appropriate form of labelling indication on natural mineral water where it has undergone an authorised treatment with ozone-enriched air or where it contains a high level of fluoride (reg. 7); (g) prohibit the sale of natural mineral water without the applicable labelling indications (which will become an offence by virtue of the operation of reg. 17 of the principal Regulations) (reg.8).