Section 2, Weights and Measures Act, 2010

(1) The units of measurement to be used throughout Sierra Leone shall be the units known as the International System of Units. (2) The International System of Units shall comprise– (a) the basic units set out in Part I of the First Schedule; International System of Units. (b) the supplementary and derived units set out in Part 2 of the First Schedule; and (c) the units which may be used in conjunction with the basic, supplementary and derived units as set out in Part 3 of the First Schedule. (3) Multiples and sub-multiples of each of the units of the International System of Units shall be an integral power of ten (positive or negative) as set out in Part 4 of the First Schedule.