Regulation 105 of the Principal Regulations is amended as follows:(a) by omitting paragraph (b) from subregulation (2) and substituting the following paragraph:(b) with the edge of the warning sign not more than 100 millimetres from the nearest point on the lens of the warning lights or, if that is not practicable, not more than 200 millimetres from the nearest point on the lens; and(b) by omitting subregulation (4) and substituting the following subregulation:(4) The warning lights at the same end of the bus must be fitted at the same height and as high as practicable.(c) by inserting the following subregulation after subregulation (6) :(7) Subregulation (2)(b) does not apply if the warning lights fitted to the front of the bus are mounted higher than 1.8 metres above the ground level.