The Legal Metrology Act, 2009
5. Base unit of weights and measures. -
1. The base unit of -
i. length shall be the metre;
mass shall be the kilogram;
iii. time shall be the second;
iv. electric current shall be the ampere;
v. thermodynamic temperature shall be the kelvin;
vi. luminous intensity shall be the candela; and
vii. amount of substance shall be the mole.
2. The specifications of the base units mentioned in sub-section (1), derived units and other units shall be such as may be prescribed.