Paragraph 3

Northern Ireland

Any variation in a dimension as to the height of a letter specified in any of those 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 105 mm does not exceed 2.5 per cent. of that dimension; or

(b)

in the case of a dimension so specified as 70 mm does not exceed 5 per cent. of that dimension.