Exceptions to regulations 55 to 58
59. Regulations 55, 56, 57(2) and 58 do not apply to a motor vehicle which is—
(a)proceeding to a place where, by previous arrangement—
(i)noise emitted by it is about to be measured for the purpose of ascertaining whether or not the vehicle complies with such of those provisions as apply to it; or
(ii) the vehicle is about to be mechanically adjusted, modified or equipped for the purpose of securing that it so complies; or
(b)returning from such a place immediately after the noise has been so measured.