Council Directive of 20 December 1979 on the approximation of the laws of the Member States relating to units of measurement and on the repeal of Directive 71/354/EEC (80/181/EEC) (c. 181)

[X1 ANNEX U.K.

Editorial Information

X1 Substituted by Corrigendum to Council Directive 80/181/EEC of 20 December 1979 on the aproximation of the laws of the Member States relating to units of measurement and on the repeal of Directive 71/354/EEC (Official Journal of the European Communities No L 39 of 15 February 1980).

CHAPTER I U.K. LEGAL UNITS OF MEASUREMENT REFERRED TO IN ARTICLE 1 (a)

1. SI UNITS AND THEIR DECIMAL MULTIPLES AND SUBMULTIPLES U.K.

1.4. Special authorized names and symbols of decimal multiples and submultiples of SI units U.K.

a The two symbols ‘ I ’ and ‘ L ’ may be used for the litre unit. (Sixteenth CGPM (1979), resolution 6).
b Unit listed in the International Bureau of Weights and Measures booklet as among the units to be permitted temporarily.
Quantity	Unit
	Name	Symbol	Value
Volume	litre	1 or L a	1 l = 1 dm 3 = 10 -3 m 3
Mass	tonne	t	1 t = 1 Mg = 10 3 kg
Pressure, stress	bar	bar b	1 bar = 10 5 Pa

Note: U.K.

The prefixes and their symbols listed in 1.3 may be used in conjunction with the units and symbols contained in Table 1.4.] U.K.