3 to 6 shall be treated as permitted by these Regulations if the variation—
(a) in the case or a dimension so specified as 300 millimetres or as over 300 millimetres, does not exceed 5%; of that dimension,
(b) in the case of a dimension so specified as 50 millimetres or as over 50 millimetres but as under 300 millimetres, does not exceed 7.5%, or that dimension, or
(c) in the case or a dimension so specified as under 50 millimetres, does not exceed 10% of that dimension.
(2) Any variation in a dimension as to the height or a letter specified in any of the diagrams in schedule 1 shall be treated as permitted by these Regulations if the variation—
(a) in the case of a dimension so specified as 100 millimetres or as over 100 millimetres does not exceed 5% of that dimension, or
(b) in the case or a dimension so specified as under 100 millimetres does not exceed 7.5% of that dimension.
(3) Without prejudice to the next following paragraph, any variation in a dimension (other than a dimension expressed in diagrams 1003.4, 1013.1, 1027.1, 1040 to 1045 or 1055 as being the maximum, or as the case may be, minimum) specified in any of the diagrams in Schedule 2 shall be treated as permitted by these regulations if the variation—
(a) in the case of a dimension so specified as 3 metres or as over 3 metres, does not exceed 15% or that dimension,
(b) in the case of a dimension so specified as 300 millimetres or as over 300 millimetres but as under 3 metres, does not exceed 20%, of that dimension, or
(c) in the case of a dimension so specified as under 300 millimetres, does not exceed 30%; of the dimension so specified, and is not less than 20%; of the dimension so specified.
(4) Any variation in a dimension as to the angle of hatching specified in any of the diagrams in schedule 2 except diagrams 1043 to 1045 shall be treated as permitted by these Regulations if the variation does not exceed 5 degrees.
Section III
Traffic signs shown in Schedule 1
9. Subject to the provisions of these Regulation, a traffic sign for conveying—
(a) to vehicular traffic on roads a warning of the description specified in or under a diagram in Part I of Schedule 1 shall be of the size, colour and type shown in the diagram relating to that warning;
(b) to vehicular traffic on roads a requirement, prohibition or restriction specified in or under a diagram in Part II of Schedule 1 (other than a requirement shown in diagram 601.1, 602, 602.1, 610 or 649.1) shall be of the size, colour and type shown in the diagram relating to that requirement, prohibition of restriction;
