Period of validity of certificate of registration and letter of authorization

Every certificate of registration granted under clause 9 and every authorization letter issued under clause 8 shall, unless renewed, suspended or cancelled, be valid for a period of three years from the date of its issue. (i) Free flowing powder form (ii) Matter-insoluble in water, per cent by weight, maximum 1.0 (iii) Zinc (as Zn). per cent by weight. minimum 33.0 (iv) Lead (as Pb), per cent by weight, maximum 0.003 (v) Copper (as Cu), per cent by weight, maximum 0.1 (vi) Magnesium (as Mg), per cent by weight, maximum 0.5 (vii) Iron (as Fe), per cent by weight, maximum 1.0 (viii) pH not less than 4.0 (ix) Sulphur (asS),percent by weight, minimum 15.0 (x) Cadmium (asCd),percent by weight, minimum 0.0025 (xi) Arsenic (as As),percent by weight, minimum 0.01