Section 2(x) in The Central Motor Vehicles Rules, 1989
(x)[ "modular hydraulic trailer" means a trailer module intended for carrying indivisible heavy or over dimensional cargo and having the following features, namely:- [Inserted by Notification No. G.S.R. 212 (E) dated 20.3.2015 (w.e.f. 1.4.2015)](i)swing axles with hydraulic suspension;(ii)independently steerable axles;(iii)two or more axle rows;(iv)suitable arrangement for joining such modules longitudinally or laterally or both;(v)suitable provision for joining such separate modules with spacer beam arrangement or by bolster arrangement or by girder bridge arrangement or by loading deck arrangement;(vi)suitable drawbar arrangement for being pulled or pushed or self propelled.
