Section 1401 in The Standards of Weights and Measures (National Standards) Rules, 1988
1401. Pa may be written as 1.401 kPa
3.1x 10 8s may be written as 31 ns(2)In a table of values for the same quantity or in a discussion of such values within a given context the same integral multiple or sub-multiple of a unit may be used for all items, even when some of the numerical values may be outside the range of 0.1 to 1000.(3)For the purpose of expression of dimensions in mechanical engineering drawings, only the millimetre shall be used.
