(1) Government of Nepal may direct for the preparation
of a set of the standard mass and measurement mentioned in ? Section 8D,
or of multiples and sub-multiples thereof. Such set shall be regarded as the
main standard.
(2) The main standard shall be of the prescribed material, design and
specifications. It shall be authenticated and stamped by the prescribed
person or authority in the prescribed manner and maintained in the
prescribed manner at the prescribed place. At periodic intervals as
prescribed, it shall be ? checked against the national standard and certified
accordingly along with the date of such check.