India, June 30 -- The Central Board of Direct Taxes (CBDT) has made Aadhaar verification mandatory for PAN card applications, besides implementing several other financial changes starting Tuesday.

Existing PAN holders will have to link their Aadhaar numbers by December 31.

Non-compliance with this rule may lead to the deactivation of the existing PAN.

Aadhaar verification will also be mandatory for booking Tatkal tickets.

Starting July 15, two-factor authentication, which will include a one-time password that will be sent to the registered mobile phone, will be required for all ticketing, online or in-person.

The Indian Railways is also expected to implement a minor increase in ticket prices. This hike may range from 1 paisa per km f...