Section 118(3) in The Central Motor Vehicles Rules, 1989
(3)[. An Airport Passenger Bus, referred to in rule 93C, shall be equipped or fitted with a speed governor (speed limiting device or speed limiting function) having maximum pre-set speed of thirty kilometer per hour or such lower speed limit as specified by the State Government from time to time, conforming to the standard AIS: 018/2001 as amended from time to time.] [Inserted by Notification No. G.S.R. 594(E), dated 13.6.2016 (w.e.f. 2.6.1989).]Reduction of noise