Section 2(2a)(a2a) in The West Bengal Motor Vehicles Tax Act, 1979
(a2a)[ "e-rickshaw" means a special purpose battery operated battery operated vehicle having three wheels and intended to provide last mile connectivity for transport of passengers for hire or reward, subject to the conditions -(i)that such vehicle is constructed or adapted to carry not more than four passengers, excluding the driver, and not more than forty kilograms luggage in total;(ii)that the net power of its motor is not more than 2000w; and(iii)that the maximum speed of the vehicle is not more than twenty-five kilometer per hour.]