This is an application for issuing a writ of certiorari to quash the order of the Government of Madras, dated 5th July, 1951. The petitioner is the proprietor of Sri Gandhibam Bus Service, Chingleput. He was granted two stage carriage permits for running two buses on the route from Vanangupet to Madras. One of the two buses M.D.H.1144 starts from Madras and the other from Vanangupet every morning at 7a.m. The schedule of timings in respect of the two buses was fixed some years ago and the said schedule has been in existence for over six years. The second respondent is the owner of bus M.D.H.1166 running between Vanangupet and Madurantakam as shuttle service with six singles. Timings for this bus also were fixed some years ago. He was starting his bus service at Vanangupet at 8-5a.m. He moved the Regional Transport Authority, Chingleput, for the revision of timings for his bus. The Regional Transport Authority by its order No.2505/B-1/50, dated 21st July, 1950, fixed the timing for his bus at 6-40a.m. instead of 8-5a.m. Against the decision of the Regional Transport Authority the petitioner preferred an appeal to the Central Road Traffic Board and the Central Road Traffic Boa