### Metrication Ordinance 《十進制條例》

1. Short title
This Ordinance may be cited as the Metrication Ordinance.
(Format changes—E.R. 5 of 2021)

2. Interpretation
(1) In this Ordinance, unless the context otherwise requires—
International System of Units (國際單位制) means the system of units of measurement from time to time recommended for international use by the General Conference of Weights and Measures;

metric units (十進制單位) means—
(a) the base units, supplementary units, derived units and symbols of the International System of Units specified in the second and third columns of Parts I, II and III of the First Schedule and defined, in the case of the base units and supplementary units, in the fourth column of the said Part I or II, as the case may be, opposite each such unit;
(b) any other units of measurement belonging to the International System of Units;
(c) such decimal multiples and sub-multiples of the metric units referred to in paragraphs (a) and (b) as may be formed by the use of the prefixes of the International System of Units specified in the second and third columns of Part IV of the First Schedule and determined, in respect of any particular decimal multiple or sub-multiple of a metric unit by reference to the factor, specified in the first column of that Part, by which such metric unit is multiplied;
(d) the units of measurement in general international use, but not belonging to the International System of Units, which are specified in the second column of the Second Schedule, the respective equivalent values whereof, expressed in SI units, being specified or referred to in the fourth column of that Schedule;

non-metric units (非十進制單位) means all units of measurement other than metric units.
(2) In this and in any other Ordinance, unless the context otherwise requires—
(a) the abbreviation “SI” stands for the International System of Units; and (E.R. 5 of 2021)
(b) each of the symbols in the third column of the First and Second Schedules stands for the unit or prefix opposite thereto in the second column.
(Format changes—E.R. 5 of 2021)

### Metrication Ordinance 《十進制條例》

3. Chief Executive may amend Ordinance by order
(1) The Chief Executive may, by order published in the Gazette, amend any Ordinance for the purpose of replacing references therein to non-metric units by references to metric units which are either equivalent or approximate thereto or which enable the references to non-metric units to be expressed in convenient metric terms.
(2) In any order made under subsection (1) the Chief Executive may, for the purposes of the Ordinance amended thereby—
(a) prohibit the use of non-metric units after a date specified in the order;
(b) declare the extent to which, and the period during which, non-metric units may continue to be used;
(c) provide for exemptions from the use of metric units for such periods and on such conditions as he may specify;
(d) generally make such incidental provisions as he thinks expedient to achieve the purposes of this Ordinance.
(3) For the purposes of subsection (1), the non-metric base units set out in the second column of the Third Schedule shall be equivalent to the values expressed in SI base units set out in the third column thereof.
(Amended 65 of 2000 s. 3)(Format changes—E.R. 5 of 2021)

4. Amendment of Schedules
The Chief Executive may, by order published in the Gazette, amend the First, Second or Third Schedule.
(Amended 65 of 2000 s. 3)(Format changes—E.R. 5 of 2021)

### Metrication Amendments (Miscellaneous Provisions) Order 《十進制修訂(雜項條文)令》

1. Citation
This Order may be cited as the Metrication Amendments (Miscellaneous Provisions) Order.
(E.R. 2 of 2021)

2. General prohibition of use of non-metric units in documents
Subject to paragraph 3, the use of non-metric units in documents submitted under the Public Bus Services Ordinance (Cap. 230) on or after the commencement* of this Order is prohibited.
(L.N. 198 of 1999; E.R. 2 of 2021) Editorial Note:
* Commencement date: 25 August 1984.

3. Circumstances in which non-metric units may continue to be used
Non-metric units shall continue to be used in documents submitted under the Public Bus Services Ordinance (Cap. 230) until one year after the commencement* of this Order— (L.N. 198 of 1999; E.R. 2 of 2021)
(a) where such documents constitute amendments to, or otherwise relate to, other documents in which non-metric units have been used; and
(b) where such other documents were submitted before the commencement* of this Order, unless such other documents were resubmitted incorporating the use of metric units in place of the non-metric units previously used.
(E.R. 2 of 2021) Editorial Note:
* Commencement date: 25 August 1984.

4. Prohibition of use of metric units and non-metric units together
No document shall be submitted under the Public Bus Services Ordinance (Cap. 230) containing references to both metric and non-metric units.
(L.N. 198 of 1999)

5. Amendment of specified provisions
Without prejudice to paragraph 2, 3 or 6, the provisions specified in the first column of the Schedule are amended by deleting, wherever it occurs, the expression specified in the second column thereof opposite such provision and substituting in each place the expression specified in the third column thereof opposite each such provision.

6. Saving
In respect of any premises or equipment which on the commencement* of this Order is included in any licence, permit or other authority granted under a provision specified in the first column of the Schedule, or in any application for such, the references specified in the second column shall continue to apply as if they had not been affected by this Order so long as the licence, permit or other authority in which it is or becomes included, or any renewal thereof, remains in force.
(E.R. 2 of 2021) Editorial Note:
* Commencement date: 25 August 1984.