Section 271(2)(a) in The West Bengal Motor Vehicles Rules, 1989
(a)The Transport Secretary shall forward the application and the copies of the documents to the Deputy Transport Commissioner (Technical) at Pool Car, or to any other organisation approved by the State Government (hereinafter referred to as "the organisation") having competence and technical capacity to check the design and the trailer, for verification and recommendation of the greatest laden and axle weights in respect of the trailers which are compatible with reasonable safety.