Section 4, Weights and Measures Act, 2010

(1) The Minister may, authorise the Standards Bureau,as the circumstances may require, to procure or cause to be prepared and maintained a national prototype standards of weights and measure of the units of the International System of Units set out in Part I of the First Schedule. (2) The national prototype standards of mass and measure shall be verified and certified in terms of the international prototype standards of mass and measure, maintained and kept by the International Bureau of Weights and Measures, by such means and in such manner as the Minister may determine. (3) When so verified and certified the national prototype standards shall be the Sierra Leonean Primary Standards of mass and measure by reference to which all standards of mass and measure shall be maintained in Sierra Leone. (4) The Sierra Leonean Primary Standards of mass and measure shall be in such form and of such material as the Minister may direct and the form, material and place of keeping shall be such as to be, as far as practicable, proof against mechanical and atmospheric agencies and all other sources of error. (5) The Minister shall also cause to be maintained such weighing machines and other articles as appear to him necessary for giving effect to this section. Measurements to be made in International System of Units. Primary