Section 6: Units of measurement, weights and measures lawful for use for trade.

(1) Subject to the provisions of this section, no person shall-
(a)
use for trade any unit of measurement of length, area, volume, capacity, mass or weight which is not included in the First Schedule to this Act;
[First Schedule.]
(b) use for trade, or have in his possession for use for trade, any linear, square, cubic or capacity measure which is not included in the Third Schedule to this Act or any weight which is not so included.
(2) No person shall use the carat (metric) for trade except for the purposes of transactions in precious stones or pearls, gold, silver or other precious metals or in articles made from gold or silver including gold or silver thread, lace or fringe.
(3) Save as may be prescribed-
(a) a linear measure specified in Part I of the Third Schedule to this Act may be marked in whole or in part with divisions and sub-divisions representing any shorter length or lengths;
(b) no capacity measure specified in Part IV of the said Third Schedule shall be used for trade by means of any division or sub-division marked thereon as a capacity measure of any lesser quantity.
(4) Any person who contravenes any of the foregoing provisions of this section shall be guilty of an offence, and any measure or weight used, or in the possession of any person for use, in contravention of any of those provisions shall be liable to be forfeited.
(5) The Minister may from time to time by order amend the First or Third Schedule to this Act-
(a) by adding to or removing from any of Parts I to V of the said First Schedule any unit of measurement of length, or area, of volume or capacity, or of mass or weight, as the case may be;
(b) by adding to or removing from any of Parts I to IV of the said Third Schedule any linear, square, cubic or capacity measure, as the case may be, or by adding to or removing from Part V of the said Third Schedule any weight.
(6) Paragraph (a) of subsection (1) of this section shall not apply to the prescribing of or to the dispensing of a prescription for, drugs but the Federal Minister charged with responsibility for health and the Minister acting jointly may by order, which shall have effect notwithstanding anything in any other written law-
(a)
prescribe what may be treated for the purposes of dealings with drugs as the equivalent of, or of any multiple or fraction of, any unit of measurement which is, or at the date of commencement of this section was, included in the First Schedule to this Act in terms of any other such unit;
[First Schedule.]
(b) require that any person carrying out any such dealing with drugs as is specified in the order under this subsection, for the purposes of which the quantity of the drugs is expressed in terms of any such unit as aforesaid, shall carry out that dealing in terms of such equivalent quantity prescribed under paragraph (a) of this subsection as is so specified.
(7) Nothing in this section shall prevent the use, during the transitional period, of imperial units on a container containing goods-
(a) where such imperial unit is placed side by side with its equivalent in metric; and
(b)
where the said unit is included in the Sixth Schedule to this Act.
[Sixth Schedule.]
(8) In all matters relating to aviation and mineral oil, the provisions of this section shall be subject to any generally accepted international convention and usage for the time being.