The assertion by India comes after Japanese government announced that it will make 'vaccine passports' available from next month for Japanese travellers.
The certificate will be paper-based rather than digital and will be issued by local governments from sometime next month, a government spokesperson said.
The court adjourned the hearing after noting that Ranaut had failed to implead the Passport Authority as a party in the case.
India has opposed the Covid vaccine passport at the G7 meeting of health ministers calling the initiative hugely discriminatory.
The state also decided to reduce the gap for the second dose of vaccine to four to six weeks for those who want to travel abroad.
Vaccination passports would add another digital layer to the multitude of existing coronavirus health and contact tracing apps many countries and U.S. states have rolled out.
Discussion is still being done if vaccinated people will be allowed. As of now, as per WHO guidelines and other countries, people with negative COVID test report is being allowed, Centre said.
Authorities have decided to open a Passport Application Processing Counter (PAPC) at the Regional Passport Office (RPO), Secunderabad, between 8 am and 12 noon on all working days from May 17 to 21
The certificates are still being developed, and how and whether they'll be used could vary widely around the world.
So-called vaccine passports, showing that someone has been inoculated against Covid-19, have been touted around the world as a potentially powerful tool.
It comes as the government announced plans for twice weekly free coronavirus tests for everyone in England to be rolled out from the end of this week.
They fear that if Sanu has managed to escape overseas using a fake passport, it would not be easy to trace him.
OCI card is issued to people of Indian origin globally which gives them almost all the privileges of an Indian national except for the right to vote, govt service and buying agricultural land.
Mehbooba had applied for a fresh passport in December last year after her passport had expired on May 31, 2020.
The row is the latest diplomatic spat centering on the British National (Overseas) passport as China imposes a sweeping crackdown on dissent in Hong Kong.