37.18. Until 31 December 2014, the self-steering axle referred to in Schedule B for classes B.44 and B.45 may be replaced by a single axle for a vehicle assembled before 1 January 2003 and whose length is 15.5 m or less.
The first paragraph applies until 31 December 2019 for a tank semi-trailer assembled before 1 January 2003 and whose length is 15.5 m or less.