Section 119(1A) in The Central Motor Vehicles Rules, 1989
(1A)[ Every combine harvester shall be fitted with an electric horn or other devices confirming to the requirements of IS 1884 : 1993 specified by the Bureau of Indian Standards for use by the driver of the vehicle and capable of giving audible and sufficient warning of the approach or position of the vehicle:Provided that the horn installation requirement for combine harvester shall be as per IS 15796:2008 specification as amended from time to time.] [Inserted by Notification No. G.S.R. 212 (E) dated 20.3.2015 (w.e.f. 1.4.2015)]