Section 27(2) in The Legal Metrology (General) Rules, 2011
(2)The re-verification shall be carried out on the completion of a period of, -(a)twenty four months for all weights, capacity measures, length measures, tape, beam scale and counter machine,(b)sixty months for storage tanks, and(c)twelve months for all weight or measure including tank lorry other than that mentioned in clauses (a) & (b).
