Refer to this previous post on this blog (20 May 2009).
Consequent to the placement of Lt Cols and equivalent in Pay Band-4, the revised orders for grant of enhanced pension have been issued by the Ministry of Defence. The full pension of pre-06 Lt Colonels is now Rs 25,700.
Of course, DA @ 22% is admissible in addition to the above mentioned amount as on date.
The complete govt letter / notification can be viewed and downloaded by clicking here.