obtain prior permission form the commissioner for using LED display screens on the sides of the car

2)for instance in Delhi In areas controlled by MCD outdoor advertisement devices visible to the public, are governed by provisions of section 142 to 146 of the Delhi Municipal Act. As per the provisions of the DMC Act, prior permission of the Commissioner is needed to display any advertisement to public view.

“Prohibition of erection, exhibition, fixation, retention or display of advertisement without written permission of the Commissioner — No person shall erect, exhibit, fix or retain or over any land, building, wall, hoarding, frame, post, kiosk/Bill Board (to be displayed on electric pole) or structure or upon or in any vehicle, any advertisement or display any advertisement to public view in any manner whatsoever in any place within the jurisdiction of the Corporation without the prior written permission of the Commissioner.

Dear Client,

Ensure compliance with all regulations governing the operation of commercial vehicles in Delhi NCR. This includes obtaining permits and licenses for operating commercial vehicles and adhering to safety standards. You have to understand the local advertising regulations in Delhi NCR. Depending on the type of advertisements you plan to display on the LED screens, there may be specific guidelines and restrictions you need to follow. Obtain permits and permissions from the relevant authorities in Delhi NCR for operating your car fleet business. This may involve seeking approval from local municipal authorities, transport departments, and other regulatory bodies. Draft comprehensive contracts for your business operations, including agreements with advertisers, drivers and any other stakeholders. These contracts should clearly outline the rights and obligations of each party involved. Ensure that you have the necessary rights to display advertisements on the LED screens, especially if you're using third-party content. Obtain appropriate licenses or permissions to avoid infringing on intellectual property rights. Obtain adequate insurance coverage for your vehicles, passengers, and business operations. This may include liability insurance, vehicle insurance, and any other relevant policies to protect against potential risks and liabilities.

As per the Transport Department, Government of NCT, Delhi circular no. F. No. MLO(TU)/Tpt/2015/131/022 dated 26.08.2015, Under the rules of City Taxi Scheme - 2015, in point No,.8 of the III category besides other conditions and permissions, 

A LCD Display panel  visible from both front and rear should be installed on the roof of the taxi to indicate that the vehicle is a taxi and whether it is available (green indicator) or occupied (red indicator). The dimensions of the LCD indicator shall conform to those prescribed by the state transport authority from time to time. 

And the next point is that the : The taxi is allowed carry advertisement in accordance with the guidelines issued by the state transport authority from time to time.. 

Yes you can sue it till you don’t break or violate RTO rules