Regulation 64
(1)
Subject to paragraph (2) of this regulation, in testing any weighing instrument, the inspector shall satisfy himself that—
(a)
it is properly balanced when unloaded;
(b)
the beam (if any) has sufficient, room for oscillation and returns to the position of equilibrium when the load is removed;
(c)
the indicator (if any) returns to the zero mark or minimum graduation when the load is removed.
(2)
Paragraph 1(a) of this regulation shall not apply in the case of a weighing instrument of a pattern in respect of which a certificate of approval granted or deemed to have been granted under section 12 of the Weights and Measures Act 1963 is in force, if such an instrument is not so constructed as to balance when unloaded.