Section 120(5) in The Central Motor Vehicles Rules, 1989
(5)[ In the case of combine harvester, the noise level at operator's ear level shall be measured as per Annex B of IS 12180 (Part-1): 2000, whereas the noise level at bystander's position shall be measured as per IS 12180 (Part-2): 2000:Provided that the noise level shall not exceed 98 dB (A) at operator's ear level and 88 dB (A) at bystander position.] [Inserted by Notification No. G.S.R. 212 (E) dated 20.3.2015 (w.e.f. 1.4.2015)]