A Vehicle is not permitted to ply with other state registration mark beyond 11 months from the date of migration . So you should apply and obtain the Karnataka Registration mark before that period.

Things to do to re-register an out of Karnataka state vehicle:

• Intimate the nearest RTO within 30 days.
• Pay the required tax.
• Re-register the vehicle within one year after coming to Bangalore.

Documents required:

• NOC from registration authority of the state where vehicle was registered.
• Registration certificate.
• Proof of address [Bangalore].
• Insurance.

There are few exemptions to Central Government employees and defence personnel.

• Life-time tax will continue, if paid in other state.
• If yearly tax is paid, they continue to pay yearly tax here in Karnataka.

You can call the RTO helpline in Bangalore: +91-80-2235 3434