The Bombay High Court on Wednesday directed the Union government to file an affidavit in response to a PIL challenging the decision of making FASTag, India's electronic toll collection chip for national highways, mandatory for all vehicles at toll plazas.

A division bench of Chief Justice Dipankar Datta and Justice G S Kulkarni was hearing the public interest litigation (PIL) filed last week by one Arjun Khanapure, challenging the decision to make provision of toll payment through FASTag mandatory at all toll plazas across the country.