Paragraph 2
Northern Ireland
Any variation in a dimension (other than as to the height of a letter) specified in any of the above diagrams shall be treated as permitted for the purposes of this Schedule if the variation—
(a)
in the case of a dimension so specified as 250 mm or as over 250 mm does not exceed 2.5 per cent. of that dimension;
(b)
in the case of a dimension so specified as 40 mm or as over 40 mm but as under 250 mm does not exceed 5 per cent. of that dimension; or
(c)
in the case of a dimension so specified as under 40 mm does not exceed 10 per cent. of that dimension.