The minimum fare for an auto-rickshaw and a black-and-yellow taxi in the Mumbai Metropolitan Region on Tuesday has been raised to Rs 27 and Rs 33 respectively, reported PTI citing officials.The officials said the fare for auto-rickshaws by Rs 1 and black-and-yellow taxis has been raised by Rs 2.The taxi fare has been revised from Rs 20.66 to Rs 21.90 per km, whilst auto-rickshaw fare has jumped from Rs 17.4 to Rs 18.22 per km, an RTO official told PTI.Read more: No need to make drivers Marathi experts, basic communication enough: Devendra FadnavisAccording to the RTO official cited by the agency, taxi and auto-rickshaw drivers can charge the revised fares either after calibrating their electronic fare meters or by displaying the RTO-approved fare table.The fare revision has been approved by the Mumbai Metropolitan Region Transport Authority (MMRTA) at its recent meeting chaired by the Maharashtra transport secretary.Directions have been issued to drivers to recalibrate their meters within three months, which is the end of November.However, the official said the revised fares will come into effect from September 1 and drivers failing to recalibrate their meters within the stipulated time will attract penalties.Read more: No need to make drivers Marathi experts, basic communication enough: Devendra FadnavisOver 4.5 lakh auto-rickshaws and 50,000 black-and-yellow taxis operate in the Mumbai Metropolitan Region, most of which run on compressed natural gas (CNG).The last fare hike of Rs 3 each for taxis and auto-rickshaws in the MMR came into effect on February 1, last year.