19. Power of Central Government to prescribe physical characteristics, etc., of weights and measures. -(1) The Central Government shall, in relation to any weight or measure, prescribe the physical characteristics, configuration, constructional details, materials, equipment, performance, tolerances, methods or procedures of tests in accordance with the recommendations made by the International Organisation of Legal Metrology:

Provided that where no such recommendation has been made, the Central Government shall prescribe such physical characteristics, configuration, constructional details, materials, equipment, performance, tolerances, methods or procedures of tests in relation to any weight or measure as it may think fit.

(2) Where it is not reasonably practicable to give effect to any recommendation made by the International Organisation of Legal Metrology, the Central Government may make such changes of a minor nature in the recommendation of the International Organisation of Legal Metrology as may appear to it to be necessary.