Prof Bitok said the current earnings from the platform get to Sh700 million from its 13 million users, a number that is below the population of registered adults in the country.
The case, initially filed by the Katiba Institute, has now been transferred from the Judicial Review Court to the Constitutional Division of the High Court.
The Ministry urged Kenyans to collect the IDs which are available at the National Registration Bureau (NRB) and Huduma Kenya offices.
The Maisha Namba requires Kenyans to provide biographical information and biometric data, including date of birth, gender, facial image, parentage information, and contact information.