Section 15 in The Standards of Weights and Measures (National Standards) Rules, 1988
15. Realisation and establishment of the national standards of weights and measures based on SI units
(1);The National Physical Laboratory shall discharge the responsibility of realising and establishing the national standards of weights and measures on the basis of recommendations made from time to time, by the General Conference on Weights and Measures or the Interna-tional Organisation of Legal Metrology, as the case may be.(2);The standards of weights and measures, so realised and established, shall be self-con-sistent.(3);For the purpose of establishing the national standards for the base units other than that of mass, the National Physical Laboratory shall--(a);prepare or cause to be prepared such objects, or equipments, or reproduce such phenomena, or both, as may be necessary for the purpose; and(b);determine or cause to be determined the values of the national standards as recommended by the General Conference on Weights and Measures and intercompare them, or cause them to be intercompared, with the corresponding international standards.(4);For the purpose of deriving the value of the kilogram, the National Physical Laboratory shall arrange the periodical determination of the value of the national prototype of the kilogram in terms of the international prototype of the kilogram and the national prototype of the kilogram, the value of which is so determined, shall be the national standard of mass.(5);For the purpose of establishing the national standards for the derived and supplemen-tary units, the National Physical Laboratory shall prepare such standards, or objects or equip-ments, or both, and determine periodically their values and accuracy in relation to the national standards of base units.
