Restriction on preparation of mixtures of fertilizer

No person shall carry on the business of preparing any mixture of fertilisers. or special mixture of fertilizers, Bio-fertilizers or Organic fertilisers except under and in accordance with the terms and conditions of a certificate of manufacture granted to him under clauses 15 or 16. (i) Boron (as B) per cent weight, minimum 17.0 (ii) Matter insoluble in water, per cent by weight, maximum 1.0 (iii) Lead (as Pb) per cent by weight, maximum 0.003